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Technical content

Features

o PC-Controlled I/O Platform o USB Powered o Provides 2.5V, 3.3V, or 5V to EV Kit o SPI Bus: 8MHz Burst o I2C/2-Wire Bus: Fast 400kHz/Standard 100kHz o Optional 1.5kΩ I2C Bus Pullup Resistors Component List 19-3838; Rev 2; 12/10

Ordering Information

PART PC INTERFACE OPERATING SYSTEMS SUPPORTED CMAXQUSB+ USB Windows 98SE/2000/XP DESIGNATION QTY DESCRIPTION C1, C2, C3 3 22µF ±10%, 16V X5R ceramic capacitors (1210) TDK C3225X5R1C226K C4 1 4.7µF ±10%, 10V X7R ceramic capacitor (0805) TDK C2012X5R1A475K C5 1 0.033µF ±10%, 6.3V (min) X7R ceramic capacitor (0603) TDK C1608X7R1E333K Murata GRM188R71E333K Taiyo Yuden EMK107BJ333KA C6, C7 2 22pF ±5% C0G ceramic capacitors (0603) TDK C1608C0G1H220J Murata GRM1885C1H220J C8, C9 2 10pF ±5% C0G ceramic capacitors (0603) Murata GRM1885C1H100J TDK C1608C0G1H100J C10–C16, C23–C32 (on back of board) 0.1µF ±10%, 10V (min) X7R ceramic capacitors (0603) TDK C1608X7R1E104K DESIGNATION QTY DESCRIPTION C17–C22 (on back of board) 1µF, 6.3V (min) X7R ceramic capacitors (0603) TDK C1608X5R0J105K Murata GRM188R60J105K Taiyo Yuden JMK107BJ105MA D1 1 100V, 1A bridge rectifier (D-70/DIP-6) Diodes Inc. DF005M J2, J3, JU2–JU5 0 Not installed, 2-pin headers LED1, LED2 2 Red LEDs (T1-3/4) Panasonic LN21RPH LED3 1 Yellow (amber) LED (T1-3/4) Panasonic LN41YPH LED4 1 Green LED (T1-3/4) Panasonic LN31GCPH P2 1 USB type-B, right-angle PC-mount receptacle P3 1 20-pin (2 x 10) right-angle male header P4 1 40-pin (2 x 20) right-angle male header P5 (JTAG) 1 10-pin (2 x 5) vertical header, keyed pin 7 SPI is a trademark of Motorola, Inc. SMBus is a trademark of Intel Corp. Windows and Windows XP are registered trademarks of Microsoft Corp. +Denotes lead(Pb)-free and RoHS compliant.

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide DESIGNATION QTY DESCRIPTION P1 0 Not installed (2mm power jack) P6 1 3-pin header P7 1 4-pin header P8 1 6-pin header R1 1 2.2k ±5% resistor (1206) R2, R5, R6 3 1.5k ±5% resistors (1206) R7, R8–R11 5 470k ±5% resistors (1206) R12, R13 2 27 ±5% resistors (1206) R14 1 10k ±5% resistor (1206) R18 1 4.7k ±5% resistor (1206) R19 1 100k ±5% resistor (1206) SW1 1 2-circuit DIP switch (DIP-4) U1 1 Low-power microcontroller (68 QFN) Maxim MAXQ2000-RAX+ U2 1 FTDI FT232BL (32 TQFP, 7mm x 7mm) U3 1 LDO linear regulator (5 SC70) Maxim MAX8511EXK25+T (Top Mark: ADV) U4 1 93C46 type 3-wire EEPROM (8 SO) 16-bit architecture U5 1 Low-voltage, p-channel MOSFET (8 SO) Maxim MAX890LESA+ U6, U7, U8 3 8-channel level translators (20 TSSOP) Maxim MAX3001EEUP+ DESIGNATION QTY DESCRIPTION U9 1 Low-voltage level translator (8 SOT23) Maxim MAX3373EEKA+T (Top Mark: AAKS) U10 1 Low-voltage level translator (14 TSSOP) Maxim MAX3390EEUD+ U11 1 LDO linear regulator (5 SC70) Maxim MAX8511EXK33+T (Top Mark: AEI) Y1 1 16MHz crystal (HC49/US) Parallel resonant, 20pF load Suntsu SCS20B-16.000MHz-I Y2 1 6MHz crystal (HC49/US) Parallel resonant, 20pF load Suntsu SCS22B-6.000MHz-I Y3 0 Not installed, 32.768kHz crystal — 1 Vertical header 2 x 3 pins — 4 Rubber bumpers, 0.100in H x 0.400in W square — 1 USB high-speed A-to-B cable, 5ft (1.5m) — 1 Shunt — 1 PCB: COMMAND MODULE (CMAXQUSB) Component List (continued)

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Panasonic Corp. 800-344-2112 www.panasonic.com Suntsu Frequency Control 949-305-0220 www.suntsuinc.com Taiyo Yuden 800-348-2496 www.t-yuden.com TDK Corp. 847-803-6100 www.component.tdk.com Component Suppliers Quick Start Maxim EV systems whose ordering number ends in EVCMAXQU are two-board sets, comprising a CMAXQUSB interface board and an EV kit board specif- ic to the device being evaluated. For example, the MAX6870EVCMAXQU would be a two-board set consist- ing of the MAX6870EVKIT and the CMAXQUSB. The fol- lowing generic quick start procedure assumes that the CMAXQUSB board will be used with a companion EV kit. Required Equipment

  • Any Maxim EV system with the EVCMAXQU suffix, such as the MAX6870EVCMAXQU Device-specific EV kit board CMAXQUSB interface board USB type A-to-B cable ( included with the CMAXQUSB)
  • Computer running Windows 98SE/2000/XP with a spare USB port Administrator privileges may be required when first installing the device on Windows 2000/XP. Procedure Do not turn on the power until all connections are complete. 1) Select 2.5V, 3.3V, or 5V logic by setting the CMAXQUSB VDD SELECT jumper. See the Jumper Tables section. 2) Ensure that the companion EV kit board’s jumper settings are correct. Refer to your companion EV kit’s documentation. 3) Connect the boards together. 4) Install the evaluation software on your computer by running the INSTALL.EXE program on the installa- tion disk. The program files are copied and icons are created for them in the Windows Start menu. 5) Connect the USB cable between the CMAXQUSB and the computer. When you plug in the CMAXQUSB board for the first time, the Windows plug-and-play system detects the new hardware and automatically runs the Add New Hardware Wizard (if the Add New Hardware Wizard does not appear after a minute, unplug the board from the USB and plug it in again). Make certain to specify the search location. Maxim software designed for CMAXQUSB includes a copy of the device driver in the installed software directo- ry. Refer to Application Note 3601: Troubleshooting Windows Plug-and-Play and USB for Maxim Evaluation Kits for more details. 6) During device driver installation, Windows XP shows a warning message indicating that the device driver Maxim uses does not contain a digital signature. This is not an error condition and it is safe to pro- ceed with the installation. 7) Start the EV kit software by clicking its icon in the Windows Start menu. 8) Refer to the companion EV kit’s documentation for fur- ther instructions demonstrating its custom software. Detailed Description of Hardware The low-voltage RISC microcontroller, MAXQ2000-RAX (U1), processes commands sent by a program running on the PC. Each particular EV kit has its own custom software specific to that kit. The FTDI FT232BM (U2) provides the USB engine. The USB 5V power is regulated down to 3.3V by U11 and down to 2.5V by U3. LED1 indicates USB 5V power is pre- sent. LED2, LED3, LED4 are general-purpose indicators. Level translators U6–U10 convert the MAXQ2000’s 2.5V logic signals to the external VDD logic level, which is jumper-selectable for 2.5V, 3.3V, or 5V logic. U9, the MAX3372, is a bidirectional level translator specially designed for the I 2C bus. DIP switch SW1 optionally disables the on-board 1.5kΩ termination resistors, allowing the use of external, user-supplied I 2C pullup resistors. Level translator U10 is designed for SPI. Note: Indicate that you are using the CMAXQUSB or MAXQ2000 when contacting these component suppliers.

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide Connectors P3 and P4 are designed to allow hardware compatibility with previous Maxim EV kit module designs. Headers P7 and P8 allow convenient probing of SMBus/I 2C and SPI bus signals. Connector P5 is used during factory test to program the MAXQ2000 in-circuit using the JTAG interface. The connector pinout is compatible with the MAXQ2000 EV kit’s MAXQ-JTAG-001 board. Platform Capabilities and Limitations General-Purpose Input and Output (GPIO) Pins LED1 is lit when VDD is powered. LED2, LED3, and LED4 are general-purpose software-controlled indicators, which also connect to GPIO lines. When driven as inputs, the output impedance should be less than 6000Ω. SMBus/I2C/2-Wire Interface The CMAXQUSB module offers “bit-banged” I 2C at 400kHz (full speed, the default) or 100kHz (slow speed). Optional user-switchable SCL/SDA pullup resistors are provided on-board. Your PC and its software limits attainable throughput. The SMBus/I 2C bus runs in bursts at rated speed, but there is some variable “dead time” between transfers due to communications over- head. Properly written PC software can minimize this dead time but cannot completely eliminate it. SPI/3-Wire Interface The CMAXQUSB module offers SPI at up to 8MHz, using the default pin configuration. All four CPOL/CPHA modes are supported. Your PC and its software limits attainable throughput. The SPI bus runs in bursts at rated speed, but there is some variable “dead time” between transfers, due to communications overhead. Properly written PC software can minimize this dead time but cannot completely eliminate it. Power Supply The CMAXQUSB is powered by the host PC’s universal serial bus (USB). The VDD system voltage can be con- figured for direct USB 5V power, 3.3V, or 2.5V using one of two on-board linear regulators. An optional external 9V DC plug-in transformer (“wall wart”) can be connected for any EV kit board that requires this unreg- ulated 9V DC power supply. Both the unregulated 9V DC and regulated VDD power-supply voltages are provided to the EV kit board on the 2 x 10 (P3) and 2 x 20 (P4) connectors. Current available to a compan- ion EV kit is 80mA. During USB suspend, the FT232BM drives the MAX890 into a partially powered mode, bringing VDD up to approximately 1.8V. No commands are sent to the firmware during this mode, so there is no impact. However, custom designs not requiring USB suspend should consider removing the MAX890 to avoid this problem. Scripting and Data Acquisition The CMAXQUSB can store a script of commands in its internal memory to eliminate communication “dead time.” A script may be repeated up to 256 times, but branching and decision making are not supported. A script may also have a maximum of 126 command/data bytes. Up to 1024 bytes of data may be collected. SMBus/I2C/2-Wire Bus Pullup Resistors SMBus/I2C requires a pullup resistor on both SCL and SDA. The CMAXQUSB provides 1.5kΩ pullup resistors, enabled by setting both circuits of DIP switch SW1 “ON.” If there are pullup resistors already on the bus, disable the CMAXQUSB’s pullup resistors by setting both circuits of SW1 “OFF.” JUMPER POSITION FUNCTION 2.5V V DD = 2.5V 3.3V V DD = 3.3V JU1 VDD SELECT 5V V DD = 5V (underneath SW1) Open Factory assembly option: replaces SW1-1. (underneath SW1) Open Factory assembly option: replaces SW1-2. JU2 Closed Connects MAXQ2000 P6.2 to P6.3, supporting the Maxim 1-Wire® interface. Open JTAG connector P5 does not connect to the +5V supply. JU4 Closed JTAG connector P5 connects to the +5V supply. Open Optional higher voltage unregulated power supply is left unconnected; connector P1 is not used. JU5 Closed Enable optional unregulated power supply from P1 to connectors P3 and P4. Jumper Tables 1-Wire is a registered trademark of Maxim Integrated Products, Inc.

MAXSMBus board. See Table 1. ground return system does not connect pin 20. 68HC16MODULE board. See Table 2. bidirectional level translators. Table 1. Connector P3 Description *This +12V signal is provided only for legacy systems and is normally unpowered. *This +12V signal is provided only for legacy systems and is normally unpowered. 1 VDD Power Supply. 2.5V, 3.3V, or 5V selected by CMAXQUSB VDD select jumper.

3 SDA SMBus/I 2C SDA (Data)

7 SCL SMBus/I 2C SCL (Clock)

9 K6 General-Purpose I/O Designated as K6. Can be used for SMBus SUSPEND output. 11 K1 General-Purpose I/O Designated as K1. Can be used for SMBus ALERT input.

13 K2 General-Purpose I/O Designated as K2

15 K3 General-Purpose I/O Designated as K3

17 K4 General-Purpose I/O Designated as K4

jumper JU5 is installed and closed, and if external power is applied through connector P1. Table 2. Connector P4 Description Optional Unregulated Higher Voltage (7.5V to 16.5V) Power Supply. is applied through connector P1.

9 RD K13 when K0 = 1 Active-Low Read Strobe

10 WR K14 when K0 = 1 Active-Low Write Strobe

11 CS0 K15 when K0 = 1 Active-Low Memory Chip-Select Strobe

12, 13, 14 — — No Connection. Reserved for additional memory chip-select strobes.

15 A0 K9 when K0 = 1 Memory Address LSB

16 A1 K10 when K0 = 1 Memory Address

17 A2 K11 when K0 = 1 Memory Address

18 A3 K12 when K0 = 1 Memory Address MSB

19 D0 K1 when K0 = 1 Memory Data LSB

connects to header P6. See Table 4. Table 2. Connector P4 Description (continued)

20 D1 K2 when K0 = 1 Memory Data

21 D2 K3 when K0 = 1 Memory Data

22 D3 K4 when K0 = 1 Memory Data

23 D4 K5 when K0 = 1 Memory Data

24 D5 K6 when K0 = 1 Memory Data

25 D6 K7 when K0 = 1 Memory Data

26 D7 K8 when K0 = 1 Memory Data MSB

27 K1 K1 General-Purpose I/O

28 K2 K2 General-Purpose I/O

29 K3 K3 General-Purpose I/O

30 K4 K4 General-Purpose I/O

31 K5 K5 General-Purpose I/O

32 K6 K6 General-Purpose I/O

33 K7 K7 General-Purpose I/O

34 K8 K8 General-Purpose I/O

35 MISO K11 SPI Master-In, Slave-Out (MISO) Data

36 MOSI K12 SPI Master-Out, Slave-In (MOSI) Data

37 SCLK K10 SPI Clock

38 CS K9 SPI Chip Select. Configurable active high or active low.

39 OW K15 General-Purpose I/O, Maxim 1-Wire Bus

*This +12V signal is provided only for legacy systems and is normally unpowered.

4 VDDIO MAXQ2000 VDDIO Power Supply

6 RESET Active-High Reset to MAXQ2000

7 KEY No Connection. Pin is physically removed.

9 TDI TDI from MAXQ2000 Test Access Port

Table 3. Connector P5 Description P6 PIN LABEL FUNCTION

1 VDD VDD Power Supply

2 OW Maxim 1-Wire Interface, Through Level

3 GND Ground Return

Table 4. Connector P6 Description

connected to labeled pins on header P7. See Table 5. ed to labeled pins on header P8. See Table 6. vice interrupts on any GPIO pins. Problem: Software reports it cannot find the board.

  • Verify that the CMAXQUSB power LED is lit.
  • Verify that the USB cable is connected.
  • Verify that Windows plug-and-play detected the board. Bring up Control Panel -> System -> Device Manager, and look at what device nodes are indicat- ed for the USB. If there is an “unknown device” node attached to the USB, delete it—this forces plug-and- play to try again. Problem: Unable to find SMBus/I 2C device.
  • Verify that the SCL and SDA signals are pulled up to VDD. CMAXQUSB DIP switch SW1 enables the on- board resistors. There must be pullup resistors somewhere on the bus.
  • If using wires to connect the CMAXQUSB to your target board, make certain that you have not swapped the SCL and SDA signals. Verify that the ground return is connected. P7 PIN LABEL FUNCTION

2 SDA SMBus/I 2C SDA (Data)

4 SCL SMBus/I 2C SCL (Clock)

Table 5. Connector P7 Description

2 MISO Master-In, Slave-Out Data

3 MOSI Master-Out, Slave-In Data

4 SCLK SPI Clock

6 GND Ground Return

Table 6. Connector P8 Description

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide U1P13 1

49 VDD

SEG11/P1.3 SEG7/P0.7/INT3 65 U1P07 SEG8/P1.0 66 U1P10 SEG9/P1.1 67 U1P11 SEG10/P1.2 68 U1P12 SEG6/P0.6/INT2 64 U1P06 SEG5/P0.5/INT1 63 U1P05 SEG4/P0.4/INT0 62 U1P04 SEG3/P0.3 61 U1P03 SEG2/P0.2 60 U1P02 SEG1/P0.1 59 U1P01 SEG0/P0.0 58 U1P00 VADJ 57 VDDIO VDDIO VLCD2 56 VLCD1 55 SEG28/P3.4/INT418 SEG29/P3.5/INT519 SEG30/P3.6/INT620 SEG31/P3.7/INT721 SEG3222 SEG33/COM323 SEG34/COM224 SEG35/COM125 COM026 VLCD 54 P7.1/RXO/INT15 53 U1P71 P7.0/TXO/INT14 52 U1P70 U1P64 U1P6346 47P6.4/TOB/WKOUT U1P6548P6.5/TO/WKOUT P6.3/T2/OW_IN U1P62 U1P6144 45P6.2/T2B/OW_OUT P6.1/T1/INT13 U1P6043 P6.0/T1B/INT12 U1P57 U1P5640 41P5.7/MISO P5.6/SCLK U1P55 U1P5438 39P5.5/MOSI P5.4/SS U1P53 U1P52 32.768kHz OPEN 37P5.3/TX1/INT11 P5.2/RX1/INT10 32KIN 32KOUT U1P40 U1P41 U1P42 U1P43 RESET 16MHz HFXIN VDDIO HFXOUTU1P15 3 SEG12/P1.4 U1P16 4 SEG13/P1.5 U1P17 5 SEG14/P1.6 U1P20 6 SEG15/P1.7 U1P21 7 SEG16/P2.0 U1P22 8 SEG17/P2.1 U1P23 9 SEG18/P2.2 U1P24 10 SEG19/P2.3 U1P25 11 SEG20/P2.4 U1P26 12 SEG21/P2.5 SEG22/P2.6 SEG23/P2.7 SEG24/P3.0 SEG25/P3.1 SEG26/P3.2 SEG27/P3.3

33 RESET

32 P4.3/TDO 31 P4.2/TMS 30 P4.1/TDI/INT9 29 P4.0/TCK/INT8 GND GND +2.5V VDDIO 10pF 10pF VDDIO C24 0.1µF +2.5 C23 0.1µF (EXPOSED PAD CONNECTS TO GND) MAXQ2000-RAX Figure 1a. CMAXQUSB Schematic (Sheet 1 of 4)

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide USBVCC 4 U1P7125 30 3 26 13 TXD U1P7024RXD U1P5223RTS U1P6522CTS U1P5321DTR U1P6420DSR 19DCD 18RI 16TXDEN 12TXLED 11RXLED 15PWREN 10SLEEP 14PWRCTL EEDATA 2 VDDIO C15 0.1µF C12 0.1µF 470Ω R12 27Ω R13 27Ω R2 1.5kΩ 0.033µF C14 0.1µF C13 0.1µF R14 10kΩ 2.2kΩ USBVCC RESET USBDM USBDP RSTOUT 3V3OUT 22pF XTIN 22pF 6MHz C16 0.1µF XTOUT EECS EESK AVVC VCC VCC VCCIO EEDATA TEST

2 CLK

+5V C17 1µF +3.3V 22µF OUT GND IN SHDN MAX8511 +5V C18 1µF +2.5V VDDIO C19 1µF OUT GND IN SHDN GND GND AGND GND R19 100kΩ R18 4.7kΩ +5V 4.7µF 4 3 OUT OUT GND ON/OFF SET IN IN FAULT 22µF SW1 VDDIO C10 0.1µF C11 0.1µF VDDIO VDDU9 MAX3373 P3-3 P3-7I/OVCC2 I/OVCC1 VCC TRI-STATE U1P61 U1P60 GND VL I/OVL2 I/OVL1 JU3 VDD 1.5kΩ 1.5kΩ MAX890 Figure 1b. CMAXQUSB Schematic (Sheet 2 of 4)

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide U1P26 3 2 VL U1P25 4 U1P63 U1P62 1 I/OVL1 P4-10 P4-916 17I/OVCC3 P4-1118I/OVCC2 P4-3920I/OVCC1 I/OVCC4 P4-18 P4-1714 15I/OVCC5 I/OVCC6 P4-16 I/OVCC7 P4-1512I/OVCC8 GND VCC U1P24 5 U1P23 6 U1P22 7 U1P21 8 U1P20 9 VDDIO 10 EN VDDIO VDD JU2 VDDIO C26 0.1µF VDD C31 0.1µF VDDIO C32 0.1µF VDD 470Ω 470Ω R10 470Ω R11 470Ω VDDIO LED1 LED RED VDDIO LED2 LED RED U1P00 VDDIO LED3 LED YELLOW U1P01 VDDIO LED4 LED GREEN U1P02 U1P16 3 2 VL U1P15 4 I/OVL2 U1P17 1 I/OVL1 P4-24 P4-2316 17I/OVCC3 P4-2518I/OVCC2 P4-2620I/OVCC1 I/OVCC4 P4-22 P4-2114 15I/OVCC5 I/OVCC6 P4-20 I/OVCC7 P4-1912I/OVCC8 GND VCC U1P14 5 I/OVL3 U1P13 6 I/OVL4 U1P12 7 I/OVL5 U1P11 8 I/OVL6 U1P10 9 I/OVL7 I/OVL8 I/OVL2 I/OVL3 I/OVL4 I/OVL5 I/OVL6 I/OVL7 I/OVL8 VDDIO 10 EN VDDIO VDD VDDIO C27 0.1µF MAX3001 U1P57 2 1 VL U1P56 3 OVL1 P4-37 P4-3611 12OVCC2 P4-3513IVCC1 OVCC3 P4-38 10OVCC4 N.C. 8TRI-STATE VCC U1P55 4 IVL2 U1P54 5 IVL3 IVL4 N.C. VDDIO

7 GND VDDIO

0.1µF VDD C22 1µF C29 0.1µF VDD C21 1µF C28 0.1µF VDD C20 1µF C25 0.1µF MAX3001 MAX3001 Figure 1c. CMAXQUSB Schematic (Sheet 3 of 4)

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide JU5 JU4 VDD P3 2 x 10 HEADER +12V 22µF OPEN P3-3 P3-3 P3-7 P3-7 P4-32 P3-9 P4-27 P3-11 P4-28 P3-13 P4-29 P3-15 P4-30 P3-17 P3-5 P3-19 P3-1 +12V P3-20 P3-2 P3-4 P3-6 P3-8 P3-10 P3-12 P3-14 P3-16 P3-18 VDD P8 1 x 6 HEADER P4-35 P8-2 P4-36 P8-3 P4-37 P8-4 P4-38 P8-5 P8-6 P8-1 VDD P7 1 x 4 HEADER P3-3 P7-2 P3-7 P7-4 P7-3 P7-1 2 x 5 HEADER U1P42 P5-5 U1P43 P5-3 U1P40 P5-1 U1P41 P5-9 P5-7 VDDIOP5-2 P5-4 P5-8 P5-10 P5-6 RESET +5V +12V 2 x 20 HEADER P4-9 P4-9 P4-11 P4-11 P4-13 P4-15 P4-15 P4-17 P4-17 P4-19 P4-19 P4-21 P4-21 P4-23 P4-23 P4-25 P4-25 P4-27 P4-27 P4-29 P4-29 P4-31 P4-31 P4-33 P4-33 P4-35 P4-35 P4-37 P4-37 P4-39 P4-39 P4-16 P4-18 P4-20 P4-22 P4-24 P4-26 P4-28 P4-30 P4-32 P4-34 P4-36 P4-38 P4-40 P4-14 P4-12 P4-16 P4-10 P4-10 P4-18 P4-20 P4-22 P4-24 P4-26 P4-28 P4-30 P4-32 P4-34 P4-36 P4-38 P4-3 P4-1 P4-5 VDD P4-7 +12VP4-4 P4-2 P4-6 VDD P4-8 VDD JU1 2 x 3 HEADER JU1-1 +5V JU1-2 +3.3V JU1-3 VDD JU1-4 VDD JU1-5 +2.5V JU1-6 BRIDGE/DF005M3 Figure 1d. CMAXQUSB Schematic (Sheet 4 of 4)

Figure 2. CMAXQUSB Component Placement Guide—Component Side (Top Silkscreen)

Figure 3. CMAXQUSB Component Placement Guide—Solder Side (Bottom Silkscreen)

Figure 4. CMAXQUSB PCB Layout—Component Side

Figure 5. CMAXQUSB PCB Layout—Solder Side

Evaluates: SPI and SMBus/I 2C-Compatible Parts CMAXQUSB User’s Guide Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 16 _______________Maxim Integrated Products, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

Revision History

2 12/10 Updated Y3 in Component List and Figure 1a 2, 8