FSA9280A ONSEMI | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 32

Technical content

To learn more about ON Semiconductor, please visit our website at www.onsemi.com Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore (_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please email any questions regarding the system integration to Fairchild_questions@onsemi.com. Is Now Part of ON Semiconductor and the ON Semiconductor logo are trademarks of Semico nductor Components Industries, LLC dba ON Semiconductor or its subsid iaries in the United States and/or other countries. ON Semiconductor ow ns the rights to a number to make changes without further notice to any products herein. ON Semicon ductor makes no warranty, representation or guarantee regarding the s uitability of its products for any particular purpose, nor does ON Semico nductor assume any liability arising out of the application or use of any product or circuit, and specifica lly disclaims any and all liability, including without limitation spe cial, consequential or incidental damages. Buyer is responsible for i ts products and applications using ON Semiconductor products, including compliance with all laws, regul ations and safety requirements or standards, regardless of any suppor t or applications information provided by ON Semiconductor. “Typica l” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in diffe rent applications and actual performance may vary over time. All operat ing parameters, including “Typicals” must be validated for each custo mer application by customer’s technical experts. ON Semiconductor does not convey any license und er its patent rights nor the rights of others. ON Semiconductor products a re not designed, intended, or authorized for use as a critical compone nt in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classifica tion in a foreign jurisdiction or any devices intended for implantation i n the human body. Should Buyer purchase or use ON Semiconductor products fo r any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semico nductor and its officers, employees, subsidiaries, affiliates, and di stributors harmless against all claims, costs, damages, and expense s, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associa ted with such unintended or unauthorized use, even if such claim alleges th at ON Semiconductor was negligent regarding the design or manufacture o f the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literatu re is subject to all applicable copyright laws and is not for resale in any manne r.

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection FSA9280A USB Port Multimedia Switch Featuring Automatic Select and Accessory Detection

Features

Signals Audio, USB, UART, USB Charging Switch Mechanism Automatic Switching with Available Interrupt Accessory Detection Headsets (Headphone/MIC/Remote) USB Data Port (SDP) UART Serial Link USB Chargers (Car-Kit, CDP, DCP) Factory-Mode TTY Converter USB FS and HS 2.0 Compliant USB Charging Battery Charging 1.1 Compliant (Including Optional DCD) Integrated Power FET Over-Voltage Tolerance (OVT) 28V Over-Current Protection (OCP) 1.5A Over-Voltage Protection (OVP) 6.8V Audio Left, Right, MIC, TTY VBAT 3 to 4.4V Programmability I2C ESD 15kV IEC 61000-4-2 Air Gap Package 20-Lead UMLP (3 x 4 x 0.55mm, 0.5mm Pitch) Ordering Information FSA9280AUMX

Description

The FSA9280A is a high-performance multimedia switch featuring automatic switching and accessory detection for the USB port. Th is switch allows sharing of a common USB port to pass audio, USB data / charging, as well as factory programmability. In addition, the FSA9280A integrates detection of accessories; such as headphones, headsets (MIC / button), car chargers, USB chargers, and UART data cables; with the ability to use a common USB connector. The FSA9280A can be programmed for manual or automatic switching of data paths based on accessory detected. FSA9280A includes an integrated 28V over-voltage and 1.5A over-current protected FET.

Applications

 Mobile Phones & Portable Media Players Related Resources  FSA9280A Evaluation Board  Evaluation Board Users Guide  For samples, questions or board requests; please contact analogswitch@fairchildsemi.com Figure 1. Typical Application

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 2 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection Table of Contents

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 4 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection Pin Descriptions Name Pin # Type Default State Description USB Interface DP_HOST 4 Signal Path Open D+ signal switch path, dedicated USB port to be connected to the resident USB transceiver on the phone DM_HOST 5 Signal Path Open D- signal switch path, dedicated USB port to be connected to the resident USB transceiver on the phone Audio Interface Audio_L 2 Signal Path Open Left audio channel from mobile phone audio-out CODEC Audio_R 1 Signal Path Open Right audio channel from mobile phone audio-out CODEC MIC 3 Signal Path Open Connected to the mobile phone audio CODEC MIC input pin UART Interface TxD 7 Signal Path Open Transmitter (Tx) from resident UART on the mobile phone RxD 6 Signal Path Open Receiver (Rx) from resident UART on the mobile phone Connector Interface ID_CON 20 Signal Path Open Connected to the USB connector ID pin and used for detecting accessories or button presses DP_CON 19 Signal Path Open Connected to the USB connector D+ pin; depending on the signaling mode, this pin can be switched to DP_HOST, Audio_R, or RxD pins DM_CON 18 Signal Path Open Connected to the USB connector D- pin; depending on the signaling mode, this pin can switched to DM_HOST, Audio_L, or TxD pins VBUS_IN 17 Power Path N/A Input voltage supply pin to be connected to the VBUS pin of the USB connector Power Interface VBAT 11 Power N/A Input voltage supply pin to be connected to the mobile phone battery output or to an internal regulator on the phone VDDIO 9 Power N/A Baseband processor interface I/O supply pin GND Exposed Center Pad Ground N/A Ground (center ground pad of package makes electrical contact) Charger Interface VBUS_OUT 15 Power Path N/A Output voltage supply pin to be connected to the source voltage pin on the charger IC CHG_DET 16 Open-Drain Output Hi-Z Open-drain active LOW output, used to signal the charger IC that a charger has been attached Factory Interface JIG 10 Open-Drain Output Hi-Z Output control signal driven by the FSA9280A and used by the processor for factory test modes BOOT 8 CMOS Output LOW Output control signal driven by the FSA9280A and used by the processor for factory test modes I2C Interface I2C_SCL 14 Input Hi-Z I2C serial clock signal to be connected to the phone-based I2C master I2C_SDA 13 Open-Drain I/O Hi-Z I2C serial data signal to be connected to the phone-based I2C master INTB 12 CMOS Output LOW Interrupt active LOW output used to prompt the phone baseband processor to read the I2C register bits, indicates a change in ID_CON pin status or accessory attach status

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 5 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection 1. Functionality The FSA9280A offers a complete solution for a single 5-pin USB interface. Through built-in detection algorithms that monitor the ID and V BUS pins of the USB interface, the FSA9280A allows seamless sharing of the interface between HS USB, FS USB or UART, and audio sources. The FSA9280A also offers a complete solution for multiple types of USB chargers. The FSA9280A detects different USB charger types and has a dedicated charger IC interface to allow charging through the devices and dynamic current control by the charger IC based on the type of charger detected. Additional over-current protection (OCP) and up to 28V over-voltage tolerance (OVT) is provided. The detection features are capable of monitoring the ID pin of the USB interface to detect a full array of USB acc essories, including audio accessories with up to 12 buttons. 1.1. Functional Overview The FSA9280A is designed for minimal software requirements for proper operation. The flow diagram below shows the basic steps of operation and contains references to more detailed information. Flow Diagram State Datasheet Section Description Power-up & Reset Section 2 Applying power to the device and reset states of the device. I2C Section 3 Communication with device through I2C (which can be bypassed during power-up). Configuration Section 4 Configuring the device using I2C and the internal registers (which can be bypassed during power-up). Detection Section 5 How the detection of the accessory is done including attachment and detachment. Processor Communication Section 6 How the detection of the accessory is indicated to the processor. Switch Configuration Section 7 Configuration of switches based on detection. Active Signal Section 8 Signal performance of selected configuration Power-up & Reset Accessory Plug-in I2C Detection Processor Communication Switch Configuration Active Signals Accessory Detached Configuration

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 6 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection 2. Power-up & Reset The FSA9280A does not need special power sequencing for correct operation. The main power of the device is provided by either VBUS_IN or VBAT. If VBUS_IN is not present and V BAT is applied, VBAT is used to power the device. VDDIO is only used for I2C interface and interrupt processing. Table 1 summarizes the enabled features of each power state of the FSA9280A. The valid voltages levels for each power supply can be found in Section 9.2. Table 1 – Power States Summary Notes: 1. V DDIO is expected to be the same supply used by the baseband I/O‟s. 2. This is not a typical state : both VBAT and VDDIO are typically provided simultaneously. 2.1. Reset When the device is reset, all the registers are initialized to the default values shown in Table 7 and all switch paths are open. After reset or power up, the FSA9280A enters Standby Mode and is ready to detect accessories sensed on its VBUS_IN and / or ID_CON pins. 2.1.1. Hardware Reset There are three hardware reset mechanisms:  Power-on reset caused by the initial rising edge of VBUS or VBAT  The falling edge of VDDIO.  With VDDIO valid, driving both I2C_SDA and I2C_SCL signals LOW for at least 30ms. Note: 3. I 2C controllers that implement clock stretching could cause reset. In this case, GPIOs could be used for the I2C interface. 2.1.2. Software Reset The device can be reset through software by writing to the Reset bit in the Register (1BH). Valid VBUS_IN Valid VBAT Valid VDDIO (1) Power State Enabled Functionality Charging through FET Processor Communication (I2C & Interrupts) Detection NO NO NO Power Down NO NO NO NO NO YES(2) ILLEGAL STATE NO YES NO Powered from VBAT NO NO YES NO YES YES Powered from VBAT NO YES YES YES NO NO Powered from VBUS_IN Yes NO YES YES YES NO Powered from VBAT YES NO YES YES NO YES(2) Powered from VBUS_IN YES YES YES YES YES YES Powered from VBAT YES YES YES

implemented for proper operation.

  1. Write Control register (02h) to configure different

switching configurations and wait timing.

  1. Write Interrupt Mask 1 and 2 registers (05h, 06h) to

mask any interrupts not required in the application.

  1. Write Timing Set 1 (08h) register to program required

key-press timing and ADC-detection timing.

  1. Write Timing Set 2 (09h) register to program required

Switching Wait timing and Long Key Press timing.

  1. Write Control register (02h) to clear INT Mask bit. This

enables interrupts to the baseband. operation of the detection algorithm. Figure 7. Detection Flow Chart

assignment of accessories based on resistor values. Table 3. ID_CON Accessory Detection Binary Value(4) ID_CON Resistance to GND Accessory Detected(5) Min. Typ. Max.

00000 GND GND GND DO NOT USE

  1. The binary values are reported in the binary register (07h) with each valid accessory detection.
  2. The accessory type is reported in the Device Type 1 (0Bh), Device Type 2 (0Bh), Button 1 (0Ch), and Button 2 (0Dh)

registers with each valid accessory detection.

  1. These resistor values are created by multiple standard resistor values in series to form the button presses on the wired
  2. For the ID float, ID “open” is recommended; otherwise, capacitance should be minimized.
  3. Audio devices with remote and audio devices with only send/end are both reported as Audio Type 1 in the Device Type 1

Audio Type 2 is designated for active audio accessories.

Figure 8. ID-Based Accessories, No VBUS_IN Attach Timing with Default Switching Wait Bits of 10ms that VBUS must be present to detect these accessories. Table 4. ID_CON and V BUS_IN Detection for USB Devices Accessory Detected(10) Min. Typ. Max.

  1. The ADC values are reported in the ADC register (07h) with an each valid accessory detection.
  2. The accessory type is reported in the Device Type 1 (0Bh) and Car Kit Status (0Eh) registers with an each valid
  3. Follows the ANSI/CEA-9 36-A USB Car Kit specification.
  4. The FSA9280A follow the Battery Charging 1.1 specification, which uses DP_CON and DM_CON to determine what USB

accessory is attached (refer to the specification for details).

Table 5. Auto-Configurations

  1. Use of FS USB on the UART path requires manual switching, as described in Section 11.4 — Systems with Multiple USB

 Manual Switch 1 (13h): Configures the switches for DM_CON, DP_CON, and VBUS_IN.  Manual Switch 2 (14h): Configures the CHG_DET, BOOT, and JIG pins.

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 16 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection 9. Electrical Specifications 9.1. Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit VBAT/VDDIO Supply Voltage from Battery / Baseband -0.5 6.0 V VBUS_IN Supply Voltage from Micro-USB Connector -0.5 28.0 V VSW Switch I/O Voltage USB -1.0 VBUS+0.5 V Stereo / Mono Audio Path Active -1.5 VBAT+0.5 All Other Channels -0.5 VBAT+0.5 IIK Input Clamp Diode Current -50 mA ICHG Charger Detect CHG_DET Pin Current Sink Capability 30 mA ISW Switch I/O Current (Continuous) USB 50 mA Audio 60 All Other Channels 50 ISWPEAK Peak Switch Current (Pulsed at 1ms Duration, <10% Duty Cycle) USB 150 mA Audio 150 Charger FET 2 A All Other Channels 150 mA TSTG Storage Temperature Range -65 +150 C TJ Maximum Junction Temperature +150 C TL Lead Temperature (Soldering, 10 Seconds) +260 C ESD IEC 61000-4-2 System ESD USB Connector Pins (DP_CON, DM_CON, VBUS_IN, ID_CON) to GND Air Gap 15.0 kV Contact 8.0 Human Body Model, JEDEC JESD22-A114 JIG, BOOT, INTB 3.5 All Other Pins, Including DP_CON, DM_CON,ID_CON and VBUS_IN 5.0 Charged Device Model, JEDEC JESD22-C101 All Pins 2.0 9.2. Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Min. Max. Unit VBAT Battery Supply Voltage(14) 3.0 4.4 V VBUSIN Supply Voltage from VBUS_IN Pin(15) 4.0 5.5 V VDDIO Processor Supply Voltage 1.8 3.6 V VSW Switch I/O Voltage USB Path Active 0 3.6 V Audio Path Active -1.2 1.2 All Other Pins 0 5.0 IDCAP Capacitive Load on ID_CON Pin for Reliable Accessory Detection 1.0 nF TA Operating Temperature -40 +85 ºC Note: 14. Fairchild does not guarantee operation below 3.0V. 15. Between 5.5 to OVP starting voltage, the charger FET is still closed so that charger IC can charge battery even with 5.9~6.0V travel adaptor.

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 17 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection 9.3. Switch Path DC Electrical Characteristics All typical values are at TA=25°C unless otherwise specified. Symbol Parameter VBAT (V) Conditions TA = -40 to +85°C Unit Min. Typ. Max. Host Interface Pins (JIG, BOOT, INTB, CHG-DET) VOH Output High Voltage(16) 3.0 to 4.4 IOH=2mA 0.7 x VDDIO V VOL Output Low Voltage 3.0 to 4.4 IOL=10mA 0.4 V Switch OFF Characteristics IOFF Power-Off Leakage Current 0 All Data Ports Except MIC VSW=0V to 4.4V 10 µA INO Switch Open Leakage Current with Device Powered 3.0 to 4.4 VBAT=4.4V; I/O Pins=0.3V, 4.1V, or Floating, Except MIC -0.100 0.001 0.100 µA IIDSHRT Short-Circuit Current(17) 3.0 to 4.4 Current Limit if ID_CON=0V 5 mA USB Switch ON Path USB Analog Signal Range 3.0 to 4.4 0 3.6 V RONUSB USB Switch On Resistance(18) 3.0 to 4.4 VD+/D-=0V, 0.4V, ION=8mA 8 10 Ω Charging FET ON Path VOVP Over-Voltage Protection (OVP) Threshold Voltage 6.2 6.8 7.2 V RONFET Charging FET On Resistance(17) VBUS_IN=4.2V-5.0V, ION=1A 200 mΩ IOCP Over-Current Protection (OCP) Threshold Current(17) VBUS_IN=5.2V 1.1 1.3 1.5 A Audio_R/Audio_L Switch ON Paths Audio Analog Signal Range 3.0 to 4.4 -1.2 3.0 V RON Audio Switch On Resistance(18) 3.0 to 4.4 VL/R=-0.8V, 0.8V, ION=30mA, f=0-470kHz 3 Ω RFLAT Audio RON Flatness(19) 3.0 to 4.4 0.1 Ω MIC and UART Switch ON Paths Analog Signal Range(20) 3.0 to 4.4 0 5 V RON MIC Path ON Resistance 3.0 to 4.4 VSW=0V, 4.4V, ION=30mA Ω UART Path ON Resistance(17) 25 30 Total Current Consumption ICCSL Battery Supply Standby Mode Current (No Accessory Attached) 3.0 to 4.4 No Accessory Static Current During Standby Mode 10 25 µA ICCSLWA Battery Supply Standby Mode Current with Accessory Attached(21)

3.8 With Accessory Static Current

30 40 µA Notes: 16. Does not apply to CHG_DET or JIG pins because they are open drain. 17. Limits based on electrical characterization data. 18. On resistance is the voltage drop between the two terminals at the indicated current through the switch. 19. Flatness is defined as the difference between the maximum and minimum values of on resistance over the specified range of conditions. 20. The MIC bias applied by the baseband should not exceed 2.8 V. 21. Applies to all accessories except Audio Type 1 and Factory-Mode accessories.

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 18 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection 9.4. Capacitance Symbol Parameter VBAT (V) Condition TA = -40 to +85°C Unit Min. Typ. Max. CONUSB DP_CON, DM_CON On Capacitance (USB Mode) 3.8 VBIAS=0.2V, f=1MHz 8 pF 9.5. Switch Path AC Electrical Characteristics All typical values are for VBAT=3.8V at TA=25ºC unless otherwise specified. Symbol Parameter Condition TA = -40 to +85°C Unit Min. Typ. Max. Xtalk Active Channel Crosstalk DP_CON to DM_CON Audio Mode f=20kHz, RT=32Ω, CL=0pF -50 dB USB Mode f=1MHz, RT=50Ω, CL=0pF -60 f=240MHz, RT=50Ω, CL=0pF -40 OIRR Off Isolation Audio Mode f=20kHz, RT=32Ω, CL=0pF -90 dB USB Mode f=1 MHz, RT=50Ω, CL=0pF -90 PSRR Power Supply Rejection Ratio, MIC on VBUS_IN Power Supply Noise 300mVpp, f=217Hz -100 dB THD Total Harmonic Distortion (Audio Path) 20Hz to 20kHz, RL=32/16Ω, Input Signal Range 2VPP 0.03 20Hz to 20kHz, RL=32/16Ω, Input Signal Range -1.2V to 1.2V 0.05 tSK(P) Skew of Opposite Transitions of the Same Output (USB Mode) tr=tf=750ps (10-90%) at 240MHz, CL=0pF, RL=50Ω 30 ps tI2CRST Time When I2C_SDA and I2C_SCL Both LOW to Cause a Reset See Figure 6 30 ms tINTMASK Time after INT Mask Cleared to “0“ until INTB Goes LOW to Signal the Interrupt after Interruptible Event while INT Mask Bit Set to “1” See Figure 18 10 ms tSDPDET Time from VBUS_IN Valid to VBUS_OUT Valid with Charger FET Closed and USB Switches Closed for USB Standard Downstream Port See Figure 10 130 ms tCHGOUT Time from VBUS_IN Valid to VBUS_OUT Valid with the Charger FET Closed for Both USB Charging Ports (CDP and DCP) See Figure 9 170 ms tCARKIT Time from VBUS_IN Valid to Car Kit Type 1 or Type 2 Charger Detected See Figure 11 200 ms tCHGDET Time from VBUS_OUT Valid to CHG_DET Output LOW for Both USB Charging Ports (CDP and DCP) and for Car Kit Chargers See Figure 9, Figure 11 100 ms tIDDET Time from ID_CON Not Floating to INTB LOW to Signal Accessory Attached that is ID_CON Resistance-Based Only (VBUS_IN Not Valid) See Figure 8 200 ms tJIGVBUS Time from VBUS_IN Valid to JIG LOW and VBUS_OUT Valid with Charger FET Closed for Both Factory Mode Operation with VBUS_IN Present See Figure 25 200 ms Time from VBUS_IN Valid to JIG LOW for Factory Mode Operation without VBUS_IN Present See Figure 26 200 ms

  1. A fast-mode I 2C-Bus® device can be used in a standard-mode I2C-Bus system, but the requirement tSU;DAT ≥

= 1250ns (according to the standard-mode I2C bus specification) before the SCL line is released.

  1. C b equals the total capacitance of one BUS line in pF. If mixed with high-speed devices, faster fall times are allowed

according to the I2C specification. Figure 23. Definition of Timing for Full-Speed Mode Devices on the I 2C Bus Table 6. I2C Slave Address

Table 7. Register Map

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 21 Address Register Type Reset Value Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 0AH Device Type 1 Read 00000000 Reserved: - Read X - Write 0 USB Charging (DCP) USB Charging (CDP) Car Kit Charger UART USB Data (SDP) Reserved: - Read X - Write 0 Audio Type 0: No detect 0: No detect 1: USB dedicated charging port (DCP) detected 1: USB charging downstream port (CDP) detected 1: Car Kit charger detected 1: UART detected 1: USB standard downstream port (SDP) detected 1: Audio Type 1 accessory detected 0BH Device Type 2 Read 00000000 Reserved: - Read XX - Write 00 TTY Reserved: - Read X - Write 0 Factory Mode – See Table 9 0: No detect 0: No detect 1: TTY detected 1: Jig: UART – Boot_OFF 1: Jig: UART – Boot_ON 1: Jig: USB – Boot_OFF 1: Jig: USB – Boot_ON 0CH Button 1 Read 00000000 Button 7 Button 6 Button 5 Button 4 Button 3 Button 2 Button 1 Send End 0: Not Pressed 1: Pressed 0DH Button 2 Read 00000000 Reserved: - Read XX - Write 00 Key Press Error Button 12 Button 11 Button 10 Button 9 Button 8 0: No Key Press Error 0: Not Pressed 1: Key Press Error detected (too short) 1: Pressed 0EH Car Kit Status Read 00000000 Reserved: - Read XXXXXX - Write 000000 Charger Type 00: No connection 01: Reserved Charger 10: Car Kit charger type 1 11: Car Kit charger type 2 0FH Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 10H Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 11H Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 12H Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 13H Manual Switch 1 Read / Write 00000000 DM_CON Connection DP_CON Connection VBUS Connection 000: Open DM_CON switch 001: DM_CON connected to DM_HOST of USB port 010: DM_CON connected to Audio_L 011: DM_CON connected to TxD of UART port 000: Open DP_CON switch 001: DP_CON connected to DP_HOST of USB port 010: DP_CON connected to Audio_R 011: DP_CON connected to RxD of UART port 00: Open VBUS switch 01: VBUS_OUT connected to VBUS_IN (Host – current sourced from the phone to accessory, max. load current is 5mA) 10: VBUS_IN connected to MIC 11: VBUS_IN connected to VBUS_OUT (Standard USB – phone sinks current from attached accessory) 14H Manual Switch 2 Read / Write 00000000 Reserved: - Read XXX - Write 000 CHG_DET BOOT JIG Reserved: - Read XXX - Write 000 0: High Impedance 0: Low 0: High Impedance 1: Low 1: High 1: Low Continued on the following page…

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 22 Address Register Type Reset Value Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 15H Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 16H Reserved N/A XXXXXXX0 Reserved: - Read XXXXXXXX, - Write 00000000 17H Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 18H Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 19H Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 1AH Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 1BH Reset R/W X0001000 Reserved: - Read XXXXXXX, - Write 0000100 Reset 0: No Reset 1: Reset (Always reads 0) 1CH Reserved N/A XXXXX001 Reserved: - Read XXXXXXXX, - Write 00000001 1DH Reserved N/A 00000000 Reserved: - Read XXXXXXXX, - Write 00000000 VBUS_IN VALID Reserved: - Read X, - Write 0 0: VBUS_IN Not Valid 1: VBUS_IN Valid 1EH Reserved N/A XXXXXXX X Reserved: - Read XXXXXXXX, - Write 00000000 1FH Reserved N/A XXXXXXX X Reserved: - Read XXXXXXXX, - Write 00000000 20H DCD Configuration Read/Write XXXXXX00 Reserved: - Read XXXXXXXX, - Write 00000000 Enable DCD Timeout Reserved: Read XX, - Write 00 0: DCD Timeout Not Enabled 1: DCD Timeout Enabled 21H Reserved N/A XXXXXX00 Reserved: - Read XXXXXXXX, - Write 00000000

  1. Each of the four registers can have unique register setting values.

paths without detaching and attaching the cable. Table 9. Factory Mode Auto-Configuration Table (1% Resistors on ID_CON Pin)

  1. The charger FET closes for factory-mode BOOT ON-UART or factory-mode BOOT OFF-UART if VBUS_IN is valid only

during the time when the cable is first plugged in or a new ID_CON resistor is detected.

  1. Audio-type device configuration is entered as part of the factory-mode flow shown in Figure 24 where the ID_CON pin is

configures the switches such that: Audio_L = DM_CON.

  1. MIC is left unconnected.
  2. The typical key sensing for Audio Type 1 accessories for wired remote is not active for this factory-mode test.

Figure 24. Factory Mode Flow

Figure 27. Reference Schematic

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 27 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection 11. Layout Guidelines 11.1. PCB Layout Guidelines for High-Speed USB Signal Integrity 1. Place FSA9280A as close to the USB controller as possible. Shorter traces mean less loss, less chance of picking up stray noise, and may radiate less EMI. a) Keep the distance between the USB controller and the device less than one inch (< 1in). b) For best results, this distance should be <18mm. This keeps it less than one quarter (¼) of the transmission electrical length. 2. Use an impedance calculator to ensure 90Ω differential impedance for DP_COM/DM_CON lines. 3. Select the best transmission line for the application. a) For example, for a densely populated board, select an edge-coupled differential stripline. 4. Minimize the use of vias and keep HS USB lines on same plane in the stack. a) Vias are an interruption in the impedance of the transmission line and should be avoided. b) Try to avoid routing schemes that generally force the use of at least two vias: one on each end to get the signal to and from the surface. 5. Cross lines, only if necessary, orthogonally to avoid noise coupling (traces running in parallel couple). 6. If possible, separate HS USB lines with GND to improve isolation. a) Routing GND, power, or components close to the transmission lines can create impedance discontinuities. 7. Match transmission line pairs as much as possible to improve skew performance. 8. Avoid sharp bends in PCB traces; a chamfer or rounding is generally preferred. 9. Place decoupling for power pins as close to the device as possible. a) Use low-ESR capacitors for decoupling if possible. b) A tuned PI filter should be used to negate the effects of switching power supplies and other noise sources if needed. 11.2. Layout for GSM/TDMA Buzz Reduction There are two possible mechanisms for TDMA/GSM noise to negatively impact the FSA9280A device ‟s performance. The first is the result of large current draw by the phone transmitter during active signaling when the transmitter is at full or almost full power. With the phone transmitter dumping large amounts of current in the phone GND plane; it is possible for there to be temporary voltage excursions in the GND plane if not properly designed. This noise can be coupled back up through the GND plane into t he FSA9280A device and, although the FSA9280A has very good isolation; if the GND noise amplitude is large enough, it can result in noise coupling to the V BUS_IN/MIC pin. The second path for GSM noise is through electromagnetic coupling onto the signal lines themselves. In most cases, the noise introduced as a result of this noise is on the V BAT and/or GND supply rails. Following are recommendations for PCB board design that help address these two sources of TDMA/GSM noise. 1. Provide a wide, low-impedance GND return path to both the FSA9280A and to the power amplifier that sources the phone transmit block. 2. Provide separate GND connections to PCB GND plane for each device. Do not share GND return paths between devices. 3. Add as large a decoupling capacitor as possible ( 1µF) between the V BAT pin and GND to shunt any power supply noise away from the FSA9280A. Also add decoupling capacitance at the PA (see the reference application schematic in Figure 27 for recommended decoupling capacitor values). 4. Add 33pF shunt capacitors on any PCB nodes with the potential to collect radiated energy from the phone transmitter. At a minimum, add these 33pF capacitors to the MIC pin (see Figure 27). 5. Add a series R BAT resistor prior to the decoupling capacitor on the V BAT pin to attenuate noise prior to reaching the FSA9280A. 11.3. VBUS_OUT Load Timing Requirements The FSA9280A includes over-current protection (OCP) used to protect the FSA9280A and any downstream devices from a high-current event. In addition, the FSA9280A has an inrush-limiting feature that helps protect against high-current transient currents during initial charger FET closure. For these two reasons, it is recommended that the system designer delay current draw >250mA from the FSA9280A VBUS_OUT pin until at least 10ms after V BUS_OUT is valid. Failure to observe this timing requirement could result in false OCP triggering and, in some cases, could result in the FSA9280A staying in OCP Mode until the load is removed and re-attached.

Figure 30. 20-Lead Ultrathin Molded Leadless Package (UMLP), 3 x 4 x 0.55mm, 0.5mm Pitch therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. http://www.fairchildsemi.com/packaging/3x4UMLP20_TNR.pdf. B. DIMENSIONS ARE IN MILLIMETERS. D. DRAWING FILENAME: MKT-UMLP20Arev1.

0.10 C A B

0.55 MAX

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA9280A • Rev 1.1.0 30 FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection

www.onsemi.com ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries i n the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . A listing of ON Semiconductor’s product/patent ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the right s of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5817−1050 www.onsemi.com LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor 19521 E. 32nd Pkwy, Aurora, Colorado 80011 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative  Semiconductor Components Industries, LLC