WF200D

Silicon Laboratories

WF200 Data Sheet: Wi-Fi짰 Network Co-Processor Rev. 1.1

Manufacturer: Silicon Laboratories

Document: 38 Pages / 941Kb

Request Quote Download Datasheet Read online HTML view

More from Silicon Laboratories Browse W parts

Online Datasheet

Read WF200D online.

WF200D SILABS | Alldatasheet

Document overview

Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
PDF pages: 38

Technical content

WF200 Data Sheet: Wi-Fi® Network Co-Processor The Silicon Labs WF200 is an Ultra Low Power Wi-Fi® transceiver or network co-pro- cessor (NCP) targeted for applications where optimal RF performance, low-power con- sumption, and secure end-to-end solution, together with fast time to market, are key re- quirements. The WF200 integrates the Balun, T/R switch, LNA and PA for best possible RF perform- ance. Co-existence with other external 2.4GHz radios is supported. WF200 has been optimized for resource and power constrained devices at the RF, pro- tocol, and firmware levels. Power conscious devices can take advantage of these fea- tures in both active and sleep modes. For security sensitive applications, WF200 provides secure boot and a secure & encryp- ted host interface. Robust security is made possible with a native integrated True Ran- dom Number Generator and OTP memory for confidential encryption key storage. The WF200 fits well with Linux-based and RTOS-based host processors. WF200 sup- ports both the 802.11 lower MAC and the 802.11 full MAC architectures. It communi- cates with the external host controller over the SPI or SDIO interface. KEY POINTS

IEEE 802.11 b/g/n compliant
TX power: +17 dBm (at pin) RX sensitivity: -96.7 dBm (at pin)
Integrated antenna diversity support
Ultra low power consumption
Secure and signed software
Encrypted host interface communication
Linux and RTOS host support
4x4 QFN32 package silabs.com | Building a more connected world. Rev. 1.1

silabs.com | Building a more connected world. Rev. 1.1 | 2

silabs.com | Building a more connected world. Rev. 1.1 | 3

Features List The key features of the WF200 Wi-Fi transceiver are listed below.

Applications

Industrial, Home and Buidling automation Home appliances
Security solutions
Retail and Commercial
Commercial transportation
Consumer medical
Sports and Fitness

Features

802.11 b/g/n Wi-Fi NCP including the radio, baseband, MAC, security and host interface
Superior link budget with integrated LNA, PA and Balun
OTP included removing the need for an external EEPROM
Ultra low power optimized solution
End-to-end security with hardware protected secure boot and encrypted host interface (optional)
802.11 split and full MAC architecture support
Complete Network Co-Processor (NCP) support for Linux and RTOS external hosts Standards/IEEE 802.11 and WFA
b - symbol rates: up to 11 Mbps
g - symbol rates: up to 54 Mbps
n - symbol rates: up to 72.2Mbps
d - regulatory domains
e - QoS as per definition in WMM specification
i - as per definition in WPA2 specification
w - protected management frames
WMM Power save
WPA/WPA2 Personal/WPA3 Personal
Supported with Linux UMAC:
WPA2 Enterprise
WPS - Wi-Fi Protected Setup Key MAC and Baseband Features
1x1 802.11n (20 MHz) with full 802.11 b/g compatibility, 72.2Mbps
Greenfield Tx/Rx for 802.11n optimal performance
Short Guard Interval (SGI) for 802.11n optimal throughput
A-MPDU Rx and Tx for high MAC throughput
Block acknowledgement for several frames
Rx Defragmentation
Roaming supported
Client, SoftAP modes supported
Concurrent AP + STA supported on different channels RF Features
Tx Power: +17 dBm Rx Sensitivity: -96.7 dBm
2 x 2.4GHz antenna pads for full antenna diversity support or FEM support
2.4GHz co-existence; 2-, 3- and 4-wire PTA support
Integrated Balun, T/R switch, LNA and PA for 2.4GHz Power Consumption
Rx (@DSSS-1Mbps): 41.6mA
Tx (17 dBm @DSSS-1Mbps): 153mA
Associated DTIM3 average current : 298 μA
Associated Sleep Current : 22 μA
Shutdown mode: 0.5 μA Security and Encryption Features
Secure boot with roll-back prevention
Encrypted host interface, dedicated hardware acceleration block
Integrated True Random Number Generator
Secure key storage using protected OTP technology
AES/WEP hardware acceleration Host Interfaces
SDIO (1-bit and 4-bit SD mode @ 26MHz)
SPI (1-bit @ 52MHz) Peripheral Interfaces
External 32kHz crystal for low power
GPIOs (including wake-up and Tx/Rx activity monitoring) ROHS/REACH Compliant

Electrical Characteristics

1.62V - 3.6V (VDDD, VDDIO, VDDRF)
3.0 - 3.6V (VDDPA) Packaging
4x4 QFN32
Temperature range: -40°C to +105°C WF200 Data Sheet: Wi-Fi® Network Co-Processor Features List silabs.com | Building a more connected world. Rev. 1.1 | 4

Ordering Guide Table 2.1. WF200 Ordering Information (R Indicates Full Reel) Part Number Description WF200D(R) WF200 802.11bgn NCP, 4x4 QFN32 WF200SD(R) WF200 802.11bgn NCP, Secure link interface, 4x4 QFN32 WF200 Data Sheet: Wi-Fi® Network Co-Processor Ordering Guide silabs.com | Building a more connected world. Rev. 1.1 | 5

System Overview

3.1 Introduction

a Wi-Fi network co-processor optimized for RF performance, low energy, and low cost, with two antenna ports, Crystal Oscil- lator, One Time Programmable Memory, and several GPIOs for interfacing with multi-protocol and RF Front End Module controls. Figure 3.1. WF200 Block Diagram 3.2 Wi-Fi Supported 2.4 GHz Bandwidth and Channels Supported operating frequencies and bandwidth Table 3.1. Supported Wi-Fi Modulations, BW, and Channels Parameter Symbol Test Condition Min Typ Max Unit Channel Center Frequency CHAN Subject to Regulatory Agency 2412 2484 MHz Channel Bandwidth BW — 20 — MHz WF200 Data Sheet: Wi-Fi® Network Co-Processor System Overview silabs.com | Building a more connected world. Rev. 1.1 | 6

Electrical Specifications All electrical parameters in all tables are specified under the following conditions, unless stated otherwise:

Typical values are based on TA = 25 °C; VVDD_IO, VVDD_D, VVDD_RF = 1.8 V; VVDD_PA= 3.3V Radio performance numbers are measured in conducted mode, based on Silicon Labs reference designs
WF200 features and benefits depend on system configuration and may require specific driver, firmware or service activation. Learn more at https://www.silabs.com/products/wireless/wi-fi Refer to Section 4.2 Operating Conditions for more details about operational supply and temperature limits.

4.1 Absolute Maximum Ratings

Stresses above those listed below may cause permanent damage to the device. This is a stress rating only and functional operation of the devices at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. For more information on the available quality and relia- bility data, see the Quality and Reliability Monitor Report at http://www.silabs.com/support/quality/pages/default.aspx. Table 4.1. Absolute Maximum Ratings Parameter Symbol Test Condition Min Typ Max Unit Storage temperature T STG -40 — 150 °C Junction temperature TJ MAX -40 — 125 °C RF power level at RF1 and RF2 ports PRFMAX Max power that can be applied to input of recommended matching network connected to RF1 and RF2 pins. — — 10 dBm Supply voltage to VDD_PA, VDD_RF, VDD_IO, VDD_D VDDMAX -0.3 — 3.6 V Voltage on XTAL_I and XTAL_O pins VXOMAX -0.3 — 1.25 V Voltage on all other pins (GPIO, Host interface, FEM, PTA, etc.) VGMAX -0.3 — VDD IO + 0.3 V V Current into any GPIO pin IO MAX — — 20 mA Sum of current into all GPIO pins IOALL_MAX — — 150 mA Range of load impedance at RF1 and RF2 pins during TX LOADTX — — 10:1 VSWR WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 7

4.2 Operating Conditions

Table 4.2. Recommended Operating Conditions Parameter Symbol Test Condition Min Typ Max Unit Ambient operating tempera- ture TA -40 — 105 °C Junction operating tempera- ture TJ -40 — 125 °C DC supply voltage to VDD_PA1 VVDD_PA 3.0 3.3 3.6 V Nominal supply voltage to VDD_RF1 VVDD_RF 1.62 1.8 3.6 V Nominal supply voltage to VDD_D VVDD_D 1.62 1.8 3.6 V Nominal supply voltage to VDD_IO VVDD_IO 1.62 1.8 3.6 V Note: 1. VDD_PA must always be greater than or equal to VDD_RF. WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 8

4.3 Power Consumption

Unless otherwise indicated, VVDD_PA = 3.3 V, VVDD_D = VVDD_RF = VVDD_IO = 1.8 V. Table 4.3. Power Consumption Parameter Symbol Test Condition Min Typ Max Unit TX mode current ITX 802.11.b: 1 Mbps, from VDD_PA at 3.3 V — 108 — mA 802.11.b: 11 Mbps, from VDD_PA at 3.3 V — 104 — mA 802.11.g: 6 Mbps, from VDD_PA at 3.3 V — 101 — mA 802.11.g: 54 Mbps, from VDD_PA at 3.3 V — 95 — mA 802.11.n: MCS = 0, from VDD_PA at 3.3 V — 100 — mA 802.11.n: MCS = 7, from VDD_PA at 3.3 V — 94 — mA 802.11.b: 1 Mbps, from 1.8 V sup- plies (VDD_RF, VDD_D, VDD_IO) — 44.6 — mA 802.11.b: 11 Mbps, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 44.7 — mA 802.11.g: 6 Mbps, from 1.8 V sup- plies (VDD_RF, VDD_D, VDD_IO) — 46.2 — mA 802.11.g: 54 Mbps, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 46.8 — mA 802.11.n: MCS = 0, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 46.1 — mA 802.11.n: MCS = 7, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 46.8 — mA RX mode current IRX 802.11.b: 1 Mbps, from 1.8 V sup- plies (VDD_RF, VDD_D, VDD_IO) — 41.6 — mA 802.11.b: 11 Mbps, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 42.3 — mA 802.11.g: 6 Mbps, from 1.8 V sup- plies (VDD_RF, VDD_D, VDD_IO) — 44.7 — mA 802.11.g: 54 Mbps, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 47.1 — mA 802.11.n: MCS = 0, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 44.5 — mA 802.11.n: MCS = 7, from 1.8 V supplies (VDD_RF, VDD_D, VDD_IO) — 47.6 — mA WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 9

Parameter Symbol Test Condition Min Typ Max Unit Sleep current on power sup- ply pins1 ISLEEP VDD_PA pin, VVDD_PA = 3.3 V — 66 — nA VDD_RF pin, VVDD_RF = 1.8 V — 87 — nA VDD_D pin, VVDD_D = 1.8 V — 18.6 — µA VDD_IO pin, VVDD_IO = 3.3 V — 3.5 — µA Snooze current on power supply pins2 ISNOOZE VDD_PA pin, VVDD_PA = 3.3 V — 66 — nA VDD_RF pin, VVDD_RF = 1.8 V — 536 — µA VDD_D pin, VVDD_D = 1.8 V — 610 — µA VDD_IO pin, VVDD_IO = 3.3 V — 51 — µA Shutdown current on power supply pins3 ISHUTDOWN VDD_PA pin, VVDD_PA = 3.3 V — 67 — nA VDD_RF pin, VVDD_RF = 1.8 V — 67.4 — nA VDD_D pin, VVDD_D = 1.8 V — 16.4 — nA VDD_IO pin, VVDD_IO = 3.3 V — 49 — nA Average current for DTIM=1 Interval Profile4 ILP_DTIM1 VDD_PA pin, VVDD_PA = 3.3 V — 154 — nA VDD_RF pin, VVDD_RF = 1.8 V — 437 — µA VDD_D pin, VVDD_D = 1.8 V — 454 — µA VDD_IO pin, VVDD_IO = 3.3 V — 3.7 — µA Average current for DTIM=3 Interval Profile4 ILP_DTIM3 VDD_PA pin, VVDD_PA = 3.3 V — 128 — nA VDD_RF pin, VVDD_RF = 1.8 V — 128 — µA VDD_D pin, VVDD_D = 1.8 V — 166 — µA VDD_IO pin, VVDD_IO = 3.3 V — 3.6 — µA Average current for DTIM=10 Interval Profile4 ILP_DTIM10 VDD_PA pin, VVDD_PA = 3.3 V — 118 — nA VDD_RF pin, VVDD_RF = 1.8 V — 38 — µA VDD_D pin, VVDD_D = 1.8 V — 65 — µA VDD_IO pin, VVDD_IO = 3.3 V — 3.7 — µA Note: 1. All memory is retained in sleep mode. WUP on timer and/or interrupt. All memory is retained and Xtal oscillator is kept on if no 32 kHz clock is provided. 3. Requires complete start-up sequence to resume operation. 4. All DTIM currents assume a 1 ms beacon time duration with a beacon interval of 102.4ms from the AP.

4.4 RF Transmitter General Characteristics

indicated, typical conditions are: Operating Ambient Temp = 25 °C, V VDD_IO = VVDD_D = VVDD_RF = 1.8 V; VVDD_PA= 3.3V, center frequency = 2,442 MHz, and measured in 50 Ω test equipment attached at antenna port. Measurements for this specification are made using the RF_1 port. See Section 5.4.1 Antenna Ports. WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 10

4.4.1 RF Transmitter Characteristics

Table 4.4. RF Transmitter Characteristics Parameter Symbol Test Condition Min Typ Max Unit Maximum RMS Output Pow- er at pin1 2 POUTMAX_RMS_ HPPA_PIN 802.11b: 1 Mbps — 17.0 — dBm 802.11b: 11 Mbps — 16.0 — dBm 802.11g: 6 Mbps — 15.6 — dBm 802.11g: 54 Mbps — 12.1 — dBm 802.11n: MCS=0 — 15.3 — dBm 802.11n: MCS=7 — 10.7 — dBm Maximum RMS Output Pow- er at Antenna (High Power PA) 2 POUTMAX_RMS_ HPPA 802.11b: 1 Mbps — 16.7 — dBm 802.11b: 11 Mbps — 15.6 — dBm 802.11g: 6 Mbps — 15.2 — dBm 802.11g: 54 Mbps — 11.7 — dBm 802.11n: MCS=0 — 14.9 — dBm 802.11n: MCS=7 — 10.3 — dBm Second Harmonic Level for POUT_MAX_PA Setting H2MAX 802.11b: 1 Mbps — -48 — dBm 802.11b: 11 Mbps — -52 — dBm 802.11g: 6 Mbps — -48 — dBm 802.11g: 54 Mbps — -50 — dBm 802.11n: MCS=0 — -49 — dBm 802.11n: MCS=7 — -51 — dBm Carrier Suppression per 802.11-2012 for POUT_MAX PA setting CSUP 802.11b: 1 Mbps — -50 — dBr 802.11b: 11 Mbps — -45 — dBr 802.11g: 6 Mbps — -32 — dBr 802.11g: 54 Mbps — -42 — dBr 802.11n: MCS=0 — -33 — dBr 802.11n: MCS=7 — -38 — dBr POUT variation from VDD_PA=3.0 V to 3.6 V POUTMAX_VAR_ V VDD_PA = 3.0 V to 3.6 V, Meas- ured on single channel — 1.1 — dB POUT variation across tem- peature POUTMAX_VAR_ T 25C to 85C — 1.7 — dB POUT backoff variation from 50 Ω load specified VSWR3 VSWR up to 2:1 VSWR — — 3.0 dB up to 3:1 VSWR — — 5.0 dB WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 11

Parameter Symbol Test Condition Min Typ Max Unit Note: 1. This is the maximum output level at the RF pin with optimum load impedance of 18.6-j9.6 Ω. Rated power levels may not apply to the edge channels, which may need additional backoff for FCC compliance. 3. The maximum backoff levels are for MCS7 and channels 2 to 10. Backoff for channels 1 and 11 to ensure band-edge compliance are detailed in UG382: WF200 Hardware Design User's Guide.

4.5 RF Receiver General Characteristics

4.5.1 RF Receiver Characteristics

Table 4.5. RF Receiver Characteristics Parameter Symbol Test Condition Min Typ Max Unit RX Sensitivity for 8% FER (1024 Octet) SENSB 802.11b: 1 Mbps, at antenna — -96.3 — dBm 802.11b: 1 Mbps, at pin — -96.7 — dBm 802.11b: 11 Mbps, at antenna — -88.3 — dBm 802.11b: 11 Mbps, at pin — -88.7 — dBm RX Sensitivity for 10% PER (1024 Octet) SENSG 802.11g: 6 Mbps, at antenna — -91.6 — dBm 802.11g: 6 Mbps, at pin — -92 — dBm 802.11g: 54 Mbps, at antenna — -74.8 — dBm 802.11g: 54 Mbps, at pin — -75.2 — dBm RX Sensitivity for 10% PER (4096 Octet) SENSEN 802.11n: MCS=0, at antenna — -91.1 — dBm 802.11n: MCS=0, at pin — -91.5 — dBm 802.11n: MCS=7, at antenna — -71.8 — dBm 802.11n: MCS=7, at pin — -72.2 — dBm Adjacent Channel ( ± 30 MHz) Selectivity with desired signal at 6 dB above refer- ence sensitivity for 8% FER (1024 Octet) ACSWB 802.11b: 1 Mbps — 54.4 — dBc 802.11b: 11 Mbps — 40.4 — dBc Adjacent Channel ( ± 25 MHz) Selectivity with desired signal at 3 dB above refer- ence sensitivity for 10% PER (1024 Octet) ACSWG 802.11g: 6 Mbps — 45.4 — dBc 802.11g: 54 Mbps — 32.9 — dBc Adjacent Channel ( ± 25 MHz) Selectivity with desired signal at 3 dB above refer- ence sensitivity for 10% FER (4096 Octet) ACSWN 802.11n: MCS=0 — 45.9 — dBc 802.11n: MCS=7 — 30.5 — dBc 2nd Adjacent Channel Sele- citivity ( ± 50 MHz) with de- sired at 6 dB above refer- ence sensitivity 8% FER (1024 Octet) A2CSWB 802.11b: 1 Mbps — 59.7 — dBc 802.11b: 11 Mbps — 52.1 — dBc 2nd Adjacent Channel Sele- citivity ( ± 50 MHz) with de- sired at 3 dB above refer- ence sensitivity 10% PER (1024 Octet) A2CSWG 802.11g: 6 Mbps — 55.1 — dBc 802.11g: 54 Mbps — 38.2 — dBc 2nd Adjacent Channel Sele- citivity ( ± 50 MHz) with de- sired at 3 dB above refer- ence sensitivity 10% PER (4096Octet) A2CSWN 802.11n: MCS=0 — 54.8 — dBc 802.11n: MCS=7 — 35.7 — dBc WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 13

Parameter Symbol Test Condition Min Typ Max Unit RX Max Strong Signal for 8% FER (1024 Octet) RXSAT_B 802.11b: 1 Mbps — -4.0 — dBm 802.11b: 11 Mbps — -10.0 — dBm RX Max Strong Signal for 10% PER (1024 Octet) RXSAT_G 802.11g: 6 Mbps — -9.0 — dBm 802.11g: 54 Mbps — -9.0 — dBm RX Max Strong Signal for 10% PER (4096 Octet) RXSAT_N 802.11n: MCS=0 — -9.0 — dBm 802.11n: MCS=7 — -9.0 — dBm U/D wtih desired at 6 dB above reference sensitivity for 8% FER (1024 Octet) OOBBB 802.11b: 1 Mbps : GSM Blocker at 893.8 MHz — 76.0 — dB 802.11b: 1 Mbps : GSM Blocker at 960 MHz — 75.0 — dB 802.11b: 1 Mbps : GSM Blocker at 1879.8 MHz — 64.0 — dB 802.11b: 1 Mbps : GSM Blocker at 1989.8 MHz — 63.0 — dB 802.11b: 1 Mbps : LTE Blocker at

893.8 MHz

— 76.0 — dB 802.11b: 1 Mbps : LTE Blocker at

960 MHz

— 75.0 — dB 802.11b: 1 Mbps : LTE Blocker at

1879.8 MHz

— 65.0 — dB 802.11b: 1 Mbps : LTE Blocker at

2506 MHz

— 56.0 — dB U/D with desired at 3 dB above reference sensitivity for 10% PER (1024 Octet) OOBBG 802.11g: 6 Mbps : GSM Blocker at 893.8 MHz — 81.0 — dB 802.11g: 6 Mbps : GSM Blocker at 960 MHz — 80.0 — dB 802.11g: 6 Mbps : GSM Blocker at 1879.8 MHz — 69.0 — dB 802.11g: 6 Mbps : GSM Blocker at 1989.8 MHz — 67.0 — dB 802.11g: 6 Mbps : LTE Blocker at — 75.0 — dB 802.11g: 6 Mbps : LTE Blocker at — 74.0 — dB 802.11g: 6 Mbps : LTE Blocker at — 62.0 — dB 802.11g: 6 Mbps : LTE Blocker at — 57.0 — dB WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 14

Parameter Symbol Test Condition Min Typ Max Unit U/D with desired at 3 dB above reference sensitivity for 10% PER (4096 Octet) OOBBN 802.11n: MCS=7 : GSM Blocker at 893.8 MHz — 55.0 — dB 802.11n: MCS=7 : GSM Blocker at 960 MHz — 54.0 — dB 802.11n: MCS=7: GSM Blocker at — 45.0 — dB 802.11n: MCS=7: GSM Blocker at

1989.8 MHz

— 44.0 — dB 802.11n: MCS=7: LTE Blocker at — 54.0 — dB 802.11n: MCS=7 : LTE Blocker at — 53.0 — dB 802.11n: MCS=7 : LTE Blocker at — 42.0 — dB 802.11n: MCS=7 : LTE Blocker at — 38.0 — dB RX Channel power Indicator Step Size RCPISTEP 802.11b: 1 Mbps — 0.5 — dBm 802.11g: 6 Mbps — 0.5 — dBm 802.11n: MCS=7 — 0.5 — dBm

4.6 Reference Oscillator and Clock Characteristics

two options for the 38.4 MHz Reference Oscillator. Use an external oscillator like a TCXO, or use a crystal with the internal oscillator. The operating temperature range of the application will be limited by the selected component’s operating temperature specifi- cation. To achieve lowest power operation during power save modes, a 32.768 KHz clock is also required. WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 15

4.6.1 Crystal Requirements for using Internal Oscillator

of the crystal affects several parameters including control settings, RF performance, frequency accuracy, and average cur- rent consumption in applications that incorporate periodic wake and sleep states. The frequency accuracy of the crystal is the main contributor to Wi-Fi frequency accuracy which must be within +/-25ppm tolerance for 802.11 b, g, and n, in 20MHz channel operation over all of the operating conditions. Refer to UG382: WF200 Hardware Design User's Guide for more details. Table 4.6. Crystal Requirements for Using Internal Oscillator Parameter Symbol Test Condition Min Typ Max Unit Nominal Frequency of HF Crystal Oscillator XTALFNOM — 38.4 — MHz Frequency tolerance of crys- tal over all conditions XTALFTOL -25 — 25 ppm Crystal Load Cap HFXCL 8 10 12 pF Equivalent Series Resist- ance HFXESR — 20 40 Ω Motional Capacitance HFX CM 2 — 4 fF Motional Inductance HFX LM 4 — 8 mH Shunt Capacitance HFXCS — 0.8 2 pF Pulling Sensitivity HFXPULL 8 12 20 ppm/pF Crystal withstanding drive strength HFXDL — — 200 uW Quality Factor HFXQ 35000 — — Spurious Mode Series Re- sistance HFXSPUR ± 0.7 MHz away from XTAL_FNOM 1100 — — Ω Insulation Resistance 100 V HFX IR 500 — — MΩ WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 16

4.6.2 External Oscillator Required Characteristics

oscillator, like a TCXO, must provide a stable and high quality signal in order for this IC to meet its performance specifica- tions. This section lists some of the requirements. If the host powers down the TCXO when going into a low power state, the host must also turn on the TCXO in advance of any transceiver activity. Table 4.7. Reference Oscillator Requirements Parameter Symbol Test Condition Min Typ Max Unit Nominal frequency of HF crystal oscillator TCXOFNOM — 38.4 — MHz Frequency tolerance of TCXO over all conditions TCXOFTOL -20 — 20 ppm Load Resistance of TCXO TCXO RL 7 10 15 KOhm Load capacitance of TCXO TCXO CL 6 10 15 pF Output level of TCXO TCXO LEVEL 0.7 0.9 1.2 V p-p Symmetry of TCXO TCXO SYMT 45 50 55 % Startup time of TCXO TCXO START — — 2 ms SSB Phase Noise of TCXO SSB1 10Hz offset — — -100 dBc/Hz SSB Phase Noise of TCXO SSB2 100Hz offset — — -110 dBc/Hz SSB Phase Noise of TCXO SSB3 1KHz offset — — -130 dBc/Hz SSB Phase Noise of TCXO SSB4 10KHz offset — — -145 dBc/Hz SSB Phase Noise of TCXO SSB5 100KHz offset — — -150 dBc/Hz SSB Phase Noise of TCXO SSB6 1 MHz offset — — -150 dBc/Hz 4.6.3 Low Power 32.768 kHz Clock Input Requirements Table 4.8. Low Power 32.768 kHz Clock Input Requirements Parameter Symbol Test Condition Min Typ Max Unit Nominal Frequency of LP_CLK FNOMLPCLK — 32.768 — KHz Frequency Tolerance of LP_CLK over all conditions1 FTOLLPCLK -1000 — 1000 ppm Load of LP_CLK pin R LPCLK — 30 — KOhm Input Level at LP_CLK SIGL LPCLK 0.7 * VDD_IO — VDD_IO V p-p Symmetry of LP_CLK DUTY LPCLK — 50 — % Note: 1. To optimize power consumption in DTIM modes, it is recommended that the frequency drift of LP_CLK within 1 second be lower than +- 100ppm. WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 17

4.7 Interface Terminal Characteristics

indicated, typical conditions are: Operating Ambient Temp = 25 °C, V VDD_IO = VVDD_D = VVDD_RF = 1.8 V; VVDD_PA= 3.3V, center frequency = 2,442 MHz, and measured by 50 Ω test equipment attached at antenna port.

4.7.1 Supply Terminal Specifications

There are four supply pins to attach to DC power sources: VDD_PA, VDD_RF, VDD_D and VDD_IO. Please refer to the section on 4.2 Operating Conditions for details on allowed voltages on these pins.

4.7.2 Digital I/O Terminal Specifications

Table 4.9. Digital I/O Terminal Specifications Parameter Symbol Test Condition Min Typ Max Unit Voltage input low (relative to VVDD_IO) VIL — — 30 % Voltage input high (relative to VVDD_IO) VIH 70 — — % Logic low output voltage (rel- ative to VVDD_IO) VOL Sinking 5 mA, VVDD_IO ≥ 1.62 V — — 25 % Logic high output voltage (relative to VVDD_IO) VOH Sourcing 5 mA, VVDD_IO ≥ 1.62 V 80 — — % Input leakage current I Leak — 1 — nA Pullup resistance RPU 30 43 65 kΩ Pulldown resistance1 RPD 30 43 65 kΩ Output fall time from VOH to VOL TOF 50 pF load, VVDD_IO = 1.62 V — 15 — ns Output rise time from VOL to VOH TOR 50 pF load, VVDD_IO = 1.62 V — 15 — ns Note: 1. RESETn pin has only pull-up resistance.

4.8 Host Interface

interface allows control of WF200 by an MCU or SoC using either SPI or SDIO. Selection between SPI and SDIO is done upon the logic state on SDIO_DAT2/HIF_SEL pin during the rising edge of RESETn signal. If this signal is HIGH, the host interface is configured as SDIO, otherwise it is configured as SPI. The tables below summarizes the pin configurations for the two modes and the achievable speeds on both interfaces Table 4.10. WF200 SPI and SDIO interface pin configuration WF200 Pin Name SPI Mode SDIO Mode RESETn 0 -> 1 1 0 -> 1 1 SDIO_DAT2/HIF_SEL 0 x 1 SDIO_DAT2 SDIO_CLK/SPI_CLK x SPI_CLK x SDIO_CLK SDIO_CMD/SPI_MOSI x SPI_MOSI x SDIO_CMD WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 18

WF200 Pin Name SPI Mode SDIO Mode SDIO_DAT0/SPI_MISO x SPI_MISO x SDIO_DAT0 SDIO_DAT1/SPI_WIRQ x WIRQ (interrupt request to the SPI host) x SDIO_DAT1 SDIO_DAT3/SPI_CSn x SPI_CSn x SDIO_DAT3 Table 4.11. Host Interface Speeds Parameter Symbol Test Condition Min Typ Max Unit SDIO V2.0 clock rate SDRate Host Interface SDIO DS Mode — — 26 MHz Host Interface SDIO HS Mode — — 52 MHz SPI clock rate SPIRate Host Interface SPI — — 52 MHz Besides the main host interface signals, a couple of other pins also complement the host interface. See AN1219 for more details:

The GPIO/WUP pin should be used by the host to wake up the WF200 when in power-save mode. This pin is programmable and if power save is not enabled on the device, this pin can be configured as a GPIO. Note that this pin should be LOW to enable the WF200 to reach sleep or shutdown modes.
GPIO/WIRQ can also optionally be used as a duplication of the IRQ signal from SPI or SDIO. If this is not required, the pin can be configured as a GPIO. WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 19

4.8.1 SPI Specification

Figure 4.1. SPI Interface Timing Parameters Table 4.12. SPI Interface Timing Specifications Symbol Description Min. Typ. Max. Unit tCLK Clock period 19.231 ns tCLK_HI Clock high 9 ns tCLK_LO Clock low 9 ns tCS_DIS_MI CS disable to MISO. VDDIO = 3.3V 8 ns CS disable to MISO. VDDIO = 1.8V 10 ns tSU_CS CS setup time 3 ns tSU_MO MOSI setup time 3 ns tHD_MO MOSI hold time 3 ns tCLKr_MI, tCLKf_MI CLK to MISO out; VDDIO = 3.3V 10 ns CLK to MISO out; VDDIO = 1.8V 21 ns Note: 1. 19.23 ns = 1/52 MHz MISO can optionally be latched either on rising edge or falling edge of CLK 3. All timing parameters valid for output load up to 2 mA WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 20

4.8.2 SDIO Specification

Figure 4.2. SDIO Interface Timing Parameters Table 4.13. SDIO Interface Timing Specifications Symbol Description Min Typ Max Unit Conditions tCLK_HS Clock period in high speed mode 19.23 ns CL ≤ 20pF tCLK_DS Clock period in default speed mode 38.46 ns CL ≤ 20pF tCLK_LO Clock low time 9 ns CL≤ 20pF tCLK_HI Clock high time 9 ns CL≤ 20pF CMD, DAT0~3 Inputs (with reference to SDIO_CLK) tSU Input Set time 3 ns CL≤ 20pF tHD Input Hold time 3 ns CL≤ 20pF CMD, DAT0~3 Outputs (with reference to SDIO_CLK) tODLY_CLKr, tODLY_CLKf Output delay time (relative to rising and falling edge) for VDD = 3.3V 11 ns VDD IO = 3.3V; CL≤ 20pF Output delay time (relative to rising and falling edge) for VDD = 1.8V 22 ns VDDIO = 1.8V; CL≤ 20pF tOH Output Hold time 3 ns CL≤ 20pF 1. Output data can be latched either on rising edge (HS mode) or falling edge (DS mode) of CLK 2. All timing parameters valid for output load of up to 2 mA WF200 Data Sheet: Wi-Fi® Network Co-Processor Electrical Specifications silabs.com | Building a more connected world. Rev. 1.1 | 21

Typical Applications and Connections

5.1 Typical Application Circuit for SDIO Host Interface

Figure 5.1. Typical Application Circuit SDIO Host Interface Note:

The SDIO pin pullup resistors are only required if the Host does not integrate internal pull-ups on SDIO signals as required by the SDIO standard.
Refer to UG382: WF200 Hardware Design User's Guide for more details on the application circuit. WF200 Data Sheet: Wi-Fi® Network Co-Processor Typical Applications and Connections silabs.com | Building a more connected world. Rev. 1.1 | 22

5.2 Typical Application Circuit for SPI Host Interface

Figure 5.2. Typical Application Circuit SPI Host Interface Note:

Refer to UG382: WF200 Hardware Design User's Guide for more details on the application circuit. WF200 Data Sheet: Wi-Fi® Network Co-Processor Typical Applications and Connections silabs.com | Building a more connected world. Rev. 1.1 | 23

5.3 Power States and Low-Power Modes

consumption on WF200 is highly dynamic. It varies significantly depending on its activity, the activation of power-save modes, and when it is in shutdown. There are four main modes, each of them having several power states as detailed below. Traffic mode: The Traffic mode is defined as the mode when WF200 is transmitting data, receiving data, or listening to the channel. If power save is not activated, the device stays in listen mode when there is no traffic. Current consumption is similar between receive and listen modes, while it is higher during transmission. Power save modes : When power save mode is activated, the device goes to a low-consumption mode and wakes-up periodically to listen to network beacons, so the device stays associated to the network. The current consumption, while receiving beacons, is as men- tioned above for reception. There are three power-save/low-power consumption cases: 1. Sleep: If a 32 KHz clock is available at LP_CLK input, then the device goes in sleep mode between reception of beacons. In this mode, most of the chip is turned off (including Xtal oscillator and host interface) to reduce the power consumption as much as possible. Given that the host interface is shut down in this mode, the host should assert the WUP pin to wake up the device before any communication with the host can be achieved. 2. Sleep with XO on: If low-power clock is not available on LP_CLK or if the Xtal oscillator cannot be shut down if the Xtal is shared, then the device goes in "Sleep with XO on" mode between reception of beacons. In this mode, the Xtal oscillator is active, so the typical consumption is higher. 3. Snooze: If low-power clock is not available on LP_CLK then the device goes in snooze mode between reception of beacons. In this mode, a smaller part of the device is shut down and the XO is always enabled, so the typical consumption is higher. The sleep or snooze state/mode can also be achieved when not associated if the firmware decides there are no tasks to perform when the wake-up signal (pin GPIO/WUP) from host is low. Shutdown mode: Shutdown mode is the case where the transceiver is shut down and reaches the lowest power consumption while still being connected to the power supplies. Getting out of stand-by requires a complete start-up sequence triggered by RESETn pin being set from low to high. Reset mode:When RESETn is low, the consumption is typically 76 µA, mainly due to the RESETn pull-up resistor within the device.

5.4 RF Connections

5.4.1 Antenna Ports

This device has two RF ports to allow antenna diversity using an internal switch. In applications with only one antenna, the un-used port should be terminated to ground through a resistor between 47 to 51 Ohm. In applications desiring to use a Front End Module (FEM), one of these ports could be used for Transmit, and the other RF Port for Receive.

5.4.2 Antenna Diversity

In Applications where the main antenna is subject to obstruction or de-tuning, a second antenna can be used at the alternate antenna port by using the switched antenna diversity report. The location of this second antenna should be such that both cannot be prevented from operating satisfactorily by the same event. A firmware feature can be invoked to determine which antenna has a better path to the remote WiFi Device.

5.4.3 FEM Support

WF200 supports the use of an external Front End Module (FEM) for customers desiring higher output power than what is provided by the built-in RF front end inside WF200. The device has a low power PA that can be used to drive an external FEM. The following plots can be used to help configure the FEM power levels and settings so that the system has adequate margin to EVM, FCC restricted band emission and mask margin. WF200 Data Sheet: Wi-Fi® Network Co-Processor Typical Applications and Connections silabs.com | Building a more connected world. Rev. 1.1 | 24

Figure 5.3. Low Power PA Emissions and Margin WF200 Data Sheet: Wi-Fi® Network Co-Processor Typical Applications and Connections silabs.com | Building a more connected world. Rev. 1.1 | 25

5.5 Clocks

5.5.1 XTAL_I and XTAL_O connections for Crystal

signal pins of a 38.4MHz crystal to the XTAL_O and XTAL_I pins with very short traces. These traces on the PCB should have short length, and minimal parasitic load. There is normally no need for external parallel capacitors because this IC includes inter- nal load capacitors which have programmable values. The value of these load capacitors will have to be determined which center the operating frequency for the design of the crystal and PCB. This value will have to be included in firmware. Firmware will program the prescribe load capacitance prior to startup, and the value should not change during operation. See UG382: WF200 Hardware Design Users Guide for more details of the crystal connections to this IC.

5.5.2 XTAL_I and XTAL_O connections for TCXO

When using a TCXO to provide 38.4MHz clock input, a series 1000pF capacitor is required between the TCXO output pin and XTAL_I pin to block DC. The XTAL_O pin can be left unconnected.

5.5.3 LP_CLK Port

A 32.768KHz clock source should be supplied to LP_CLK pin to enable the lowest power operation in power save modes. The frequen- cy tolerance of this source affects wake up scheduling.

5.6 Multi-Protocol Coexistence

In case an RF transceiver using the same 2.4 GHz band (e.g. Bluetooth, Zigbee, or Thread) is co-located with the WF200 Wi-Fi trans- ceiver, the Packet Traffic Arbitration (PTA) interface can be used to minimize mutual interference. In this case, PTA pins are connected to the other transceiver. The PTA interface is highly programmable and can use 1, 2, 3, or 4 pins upon configuration. WF200 embeds a Packet Traffic Arbitration block in order to share the access to the RF medium between WLAN and another standard. Depending on manufacturer, PTA signal names can vary and the table below shows some alternative naming: Table 5.1. PTA Alternative Naming WF200 Pin Name Alternative Names PTA_TX_CONF GRANT, WL_ACTIVE, WL_DENY PTA_RF_ACT REQUEST, BT_ACTIVE PTA_STATUS PRIORITY, BT_STATUS PTA_FREQ FREQ, BT_FREQ PTA interface configuration is also achieved via the configuration file. See https://docs.silabs.com/wifi/wf200/additional-resources#documentation for more information regarding PTA and coexistence man- agement on WF200, as well as AN1017 and AN1128 for EFR32BGx and EFR32MGx devices supporting BLE, Zigbee, and Thread. WF200 Data Sheet: Wi-Fi® Network Co-Processor Typical Applications and Connections silabs.com | Building a more connected world. Rev. 1.1 | 26

Pin Descriptions Figure 6.1. WF200 Pinout Table 6.1. Pin Definitions Pin # Pin Name I/O Description / Default

1 GPIO/FEM_1 I/O This pin can be used for dynamic control of an external front-end

module (FEM), otherwise this can be used as GPIO.

2 GPIO/FEM_2 I/O This pin can be used for dynamic control of an external front-end

module (FEM), otherwise this can be used as GPIO.

3 GPIO/FEM_3 I/O This pin can be used for dynamic control of an external front-end

module (FEM), otherwise this can be used as GPIO.

4 GPIO/FEM_4 I/O This pin can be used for dynamic control of an external Power

amplifier detector output (Vdet) in case an external power amplifi- er or a FEM is used. Otherwise this can be used as GPIO.

5 GPIO/FEM_PDET I/O Programmable Pins / FEM Power detector Interface

6 RESERVE_2 I/O Reserved. This pin should be left unconnected.

7 XTAL_I I Crystal pin 1 (or reference clock input if driven by TCXO)

8 XTAL_O O Crystal pin 2 (leave floating if XTAL_I driven by TCXO)

9 VDD_RF I RF power supply

WF200 Data Sheet: Wi-Fi® Network Co-Processor Pin Descriptions silabs.com | Building a more connected world. Rev. 1.1 | 27

Pin # Pin Name I/O Description / Default

10 GND GND Ground

11 RF_1 I/O RF Port 1 to connect to main antenna

12 RF_2 I/O RF Port 2 to connect to diversity antenna

13 VDD_PA I PA Power Supply

14 RESERVE_1 GND Reserved. For normal operation, this pin must be grounded

15 RESETn I Reset pin, active low

16 GPIO/WUP I/O This pin can be used to wake up the device from sleep mode, or

17 GPIO/FEM_5 I/O This pin can be used to dynamically control an external front-end

module (FEM), otherwise this can be used as GPIO.

18 GPIO/FEM_6 I/O This pin can be used to dynamically control an external front-end

module (FEM), otherwise this can be used as GPIO.

19 GPIO/PTA_TX_CONF I/O As part of PTA interface, this pin can be used to manage co-exis-

tence with another 2.4 GHz radio or can be used as a GPIO

20 GPIO/PTA_RF_ACT I/O As part of PTA interface, this pin can be used to manage co-exis-

tence with another 2.4 GHz radio or can be used as a GPIO

21 GPIO/PTA_STATUS I/O As part of PTA interface, this pin can be used to manage co-exis-

tence with another 2.4 GHz radio or can be used as a GPIO

22 GPIO/PTA_FREQ I/O As part of PTA interface, this pin can be used to manage co-exis-

tence with another 2.4 GHz radio or can be used as a GPIO 23 GPIO/LP_CLK I Low Power clock input. This pin is typically connected to the 32 KHz reference clock.

24 GPIO/WIRQ I/O In SDIO mode, this pin is an interrupt pin from WF200 to host to

indicate a message or data should be read. In SPI mode, this pin can be used as a GPIO. 25 VDD_DIG I Digital Power Supply. Identical to VDD_D

26 SDIO_CLK/ SPI_CLK I Host interface: SDIO_CLK or SPI_CLK

27 SDIO_CMD/ SPI_MOSI I/O Host interface: SDIO_CMD or SPI_MOSI

28 SDIO_DAT0/ SPI_MISO I/O Host interface: SDIO_DAT0 or SPI_MISO

29 SDIO_DAT1 / SPI_WIRQ I/O Host interface: SDIO_DAT1 or WIRQ

30 SDIO_DAT2/ HIF_SEL I/O Host interface selection: Used to select the host interface during

reset rising edge. If Low, selects SPI interface. When High, se- lects SDIO interface and this pin becomes SDIO_DAT2

31 SDIO_DAT3/ SPI_CSn I/O Host interface: SDIO_DAT3 or SPI_CSn

32 VDD_IO I IO Power Supply

0 GND GND Exposed Die Pad

WF200 Data Sheet: Wi-Fi® Network Co-Processor Pin Descriptions silabs.com | Building a more connected world. Rev. 1.1 | 28

Package Outline Figure 7.1. WF200 Package Outline WF200 Data Sheet: Wi-Fi® Network Co-Processor Package Outline silabs.com | Building a more connected world. Rev. 1.1 | 29

Table 7.1. WF200 Package Diagram Dimensions Dimension MIN NOM MAX A 0.80 0.85 0.90 A1 0.00 0.02 0.05 A3 0.20 REF b 0.15 0.20 0.25 D 3.90 4.00 4.10 E 3.90 4.00 4.10 D2 2.60 2.70 2.80 E2 2.60 2.70 2.80 e 0.40 BSC L 0.20 0.30 0.40 K 0.20 --- --- R 0.075 --- 0.125 aaa 0.10 bbb 0.07 ccc 0.10 ddd 0.05 eee 0.08 fff 0.10 WF200 Data Sheet: Wi-Fi® Network Co-Processor Package Outline silabs.com | Building a more connected world. Rev. 1.1 | 30

Land Pattern Figure 8.1. WF200 Land Pattern Dimension mm L 0.76 W 0.22 e 0.40 S 3.21 S1 3.21 L1 2.80 W1 2.80 General

All dimensions shown are in millimeters (mm) unless otherwise noted. This land pattern design is based on the IPC-7351 guidelines. Solder Mask Design
All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm minimum, all the way around the pad. Stencil Design
A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. The stencil thickness should be 0.101mm (4 mils).
The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads.
A 2x2 array of 1.10mm x 1.10mm openings on 1.30mm pitch should be used for the center ground pad. Card Assembly
A No-Clean, Type-3 solder paste is recommended. The recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. Note: Above notes and stencil design are shared as recommendations only. A customer or user may find it necessary to use different parameters and fine tune their SMT process as required for their application and tooling. WF200 Data Sheet: Wi-Fi® Network Co-Processor Land Pattern silabs.com | Building a more connected world. Rev. 1.1 | 31

Top Marking Figure 9.1. WF200 Top Marking Table 9.1. Top Marking for WF200 OPN PPPPPPPP TTTTTT WF200SD SD WF200D D Note: YY = Year. WW = Work Week WF200 Data Sheet: Wi-Fi® Network Co-Processor Top Marking silabs.com | Building a more connected world. Rev. 1.1 | 32

Software Reference This section gives a short overview of the software involved to run applications based on this device. The firmware running in the WF200 allows it to be used at Lower MAC level (in split MAC) or at the Upper Mac level (in Full MAC).

10.1 Host and Device Software

This device is intended to be used as a Network Co-Processor (NCP) which means that it requires a host processor to run the applica- tion. Depending on architecture choices based on required throughput, host memory size and power, the MAC layer can be split be- tween WF200 and its host or fully ran in WF200.

10.1.1 Split MAC

The so-called split MAC is the case where WF200 runs the Lower MAC section while the host processor runs the Upper MAC. This is a use case that typically fits the Linux application as MAC802.11 is provided with Linux For such an application, Silicon Labs provides the embedded firmware implementing the Lower MAC as well as needed configuration tasks. Sample core Linux drivers are available for a variety of platforms. The figure below shows the typical software architecture in Split MAC implementations. Figure 10.1. Split MAC Implementation WF200 Data Sheet: Wi-Fi® Network Co-Processor Software Reference silabs.com | Building a more connected world. Rev. 1.1 | 33

10.1.2 Full MAC

scenario, both the lower MAC and upper MAC are running in WF200. The WF200 contains a WPA/WPA2 personal supplicant, allowing it to handle full MAC responsibilities without utilizing the host MCU. The host receives an IP packet and implements all stack layers necessary above it. The figure below shows the typical software architecture in Full MAC implementations. Figure 10.2. Full MAC Implementation Note: The WPA supplicant on WF200 does not support WPA enterprise. If WPA-enterprise is required, then it should be implemented above the IP stack in the host MCU software.

10.1.3 Software Documentation

Documentation required for software implementation is available at https://docs.silabs.com/

10.2 Security

The WF200 implements several security features as listed below.

10.2.1 Secure Device

WF200 disables access to all debug ports. WF200 Data Sheet: Wi-Fi® Network Co-Processor Software Reference silabs.com | Building a more connected world. Rev. 1.1 | 34

10.2.2 Secure Boot

includes several features related to boot and firmware security. Firmware authentication and encryption do not have any impact on host software, whereas firmware roll back prevention requires more flexibility and is managed by each customer through soft- ware.

Firmware authentication: The downloaded firmware is authenticated such that only Firmware provided by Silicon Labs can run in WF200.
Firmware encryption: The downloaded firmware is encrypted when generated by Silicon Labs and is decrypted inside WF200 during firmware download.
Firmware roll back prevention: If a security threat is discovered, Silicon Labs has the ability to increment in its firmware an anti-roll- back tag. This can be used by the customer to prevent the part from starting with a firmware having a tag lower than a specified one. This mechanism is managed by each customer on a case-by-case need.

10.2.3 Secure Link (WF200SD only)

Secure Link refers to the capability to have encrypted SPI/SDIO communication between the host and WF200. This feature requires the host and WF200 to exchange a key based on a shared secret stored on both sides nonvolatile secured memories and programmed at the end product manufacturing stage. The encrypted interface uses a Diffie-Hellman algorithm key exchanges on a per session/per de- vice basis. As a result, a given link is secured uniquely on a given device, and keys are regenerated on a power cycle. There are 3 possible cases for secure link:

Secure link is not used: In this scenario, the part does not encrypt any communication with the host.
Secure link is temporary enabled: Secure Link can be activated through software, with a software key which is not stored in WF200. Doing this allows to assess the performance and consumption impacts of secure link. In this mode, Secure Link is achieved as long as the part is not reset. The next restart of WF200 will make it start in Non-Secure Link mode.
Permanent Secure Link: This mode is activated by software and the key exchanged is permanently stored in WF200 non-volatile memory. Once configured in this mode, WF200 only understands host interface messages which have been encrypted with the stor- ed key. Once a secure link has been established, the host can choose to only encrypt certain API messages between the host and the WF200 to reduce the power and latency overhead of encryption.

10.3 Startup, Sleep and Shutdown

10.3.1 Power On, Reset, and Boot

When RESETn pin is set HIGH, WF200 is getting out of its reset mode. All supply voltages should be settled within the operational range before the rising edge of RESETn pin. Then the boot sequence can be initiated by the host software with the following sequence:

Some registers describing the required configuration before firmware download are written by the driver.
The driver initiates the boot.
The driver downloads the embedded firmware into WF200.
The driver configures WF200 upon the hardware platform and requested features with a dedicated configuration file.

10.3.2 Sleep and Snooze Modes

The sleep or snooze modes are reached when power-save mode has been enabled on the WF200. These modes highly reduce power consumption while maintaining all configuration and context, so that the device can be quickly back to normal operation. A WF200 driver command is used to indicate that the driver wants the part to go to power-save. However it is the firmware on WF200 that de- cides when it switches into sleep mode based on Wi-Fi activity. The part wake-up is achieved by asserting the GPIO/WUP pin. The sleep mode requires a 32 KHz clock to be provided on LP_CLK pin. In case a 32 KHz clock is not available, the part can be set in a snooze mode which is functionally equivalent but draws more current. WF200 Data Sheet: Wi-Fi® Network Co-Processor Software Reference silabs.com | Building a more connected world. Rev. 1.1 | 35

10.3.3 Shutdown Mode

mode can be used if the Wi-Fi feature is not needed for a long period of time. This mode achieves the lowest current consumption on the device but requires a full power-up reset and boot sequence to come back to the operational mode. This mode should be initiated by the host. Note: A similar behavior could be achieved by asserting RESETn pin low, but would draw more current. WF200 Data Sheet: Wi-Fi® Network Co-Processor Software Reference silabs.com | Building a more connected world. Rev. 1.1 | 36

Revision History Revision 1.1 September, 2020

Updated Ordering Guide Updated Table 9.1 Top Marking for WF200 on page 32 Revision 1.00 July, 2019
Updates to Electrical specifications section
Addition of low power PA graphs
Updates to power consumption and supported bandwidth and channels table
Textual and figure updates to improve clarity Revision 0.60 December, 2018
Initial Release WF200 Data Sheet: Wi-Fi® Network Co-Processor

Revision History

silabs.com | Building a more connected world. Rev. 1.1 | 37

Smart. Connected. Energy-Friendly.Products www.silabs.com/products Quality www.silabs.com/quality Support and Community community.silabs.com http://www.silabs.com Silicon Laboratories Inc.

400 West Cesar Chavez

Austin, TX 78701 USA Disclaimer Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes without further notice to the product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Without prior notification, Silicon Labs may update product firmware during the manufacturing process for security or reliability reasons. Such changes will not alter the specifications or the performance of the product. Silicon Labs shall have no liability for the consequences of use of the information supplied in this document. This document does not imply or expressly grant any license to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any FDA Class III devices, applications for which FDA premarket approval is required, or Life Support Systems without the specific written consent of Silicon Labs. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Silicon Labs disclaims all express and implied warranties and shall not be responsible or liable for any injuries or damages related to use of a Silicon Labs product in such unauthorized applications. Trademark Information Silicon Laboratories Inc.®, Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clock Builder®, CMEMS®, DSPLL®, EFM®, EFM32®, EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®, Gecko®, Gecko OS, Gecko OS Studio, ISOmodem®, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress® , Zentri, the Zentri logo and Zentri DMS, Z- Wave®, and others are trademarks or registered trademarks of Silicon Labs. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of ARM Holdings. Keil is a registered trademark of ARM Limited. Wi-Fi is a registered trademark of the Wi-Fi Alliance. All other products or brand names mentioned herein are trademarks of their respective holders.

Product Information

WF200D specifications and overview.

Summary

WF200 Data Sheet: Wi-Fi짰 Network Co-Processor Rev. 1.1

Description

WF200 Data Sheet: Wi-Fi짰 Network Co-Processor Rev. 1.1

Source title WF200D Datasheet(PDF) - Silicon Laboratories

Related Parts

More parts from the same family.

Browse manufacturer