UM0212 User manual. STOTG04 USB OTG full-speed transceiver demonstration board. Introduction

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1 UM0 User manual STOTG04 USB OTG full-speed transceiver demonstration board Introduction This manual explains how to use and take full advantage of the STOTG04 universal serial bus (USB) on-the-go (OTG) full-speed transceiver demonstration board, which is designed to help users evaluate their USB OTG applications. The PC board (PCB) connections make it possible to test the STOTG04 transceiver while it is connected to the USB OTG controller. Without the controller, the STOTG04 is configurable through the I C interface. The STOTG04 is fully compliant with the USB v.0 specification and the on-the-go supplement to this specification (see for details). It provides a complete physical layer (PHY) solution for any USB OTG device. When the STOTG04 is connected to a USB OTG controller, it is ideal for use with several mobile applications (such as cell phones, digital cameras, printers and PDAs). The STOTG04 transceiver is controlled by the "USB OTG Demo" software that runs on Microsoft Windows operating systems. This software enables designers to configure and monitor the transceiver s internal registers. Figure. STOTG04 demonstration board November 008 Rev /3

2 Contents UM0 Contents STOTG04 demonstration board hardware STOTG04 power requirements Connecting to a PC Jumper assignments Connector assignments CON3 pin Reset switch (SW) USB OTG demonstration software Launching the software PC-to-demonstration board communication STOTG04 registers Appendix A STOTG04 demonstration board schematics Appendix B STOTG04 demonstration board bill of materials Revision history /3

3 UM0 STOTG04 demonstration board hardware STOTG04 demonstration board hardware The demonstration board consists of six main parts (see Figure and Figure 3). Power supply pins (V BAT and V IF ) Level shifters The STOTG04 full-speed transceiver Configuration jumpers A USB OTG controller connector A reset switch (see Section.5). The STOTG04 needs two types of power supply voltages to function (see Section.). The battery supply voltage (V BAT ) supplies power to the analog functions, and the digital interface voltage (V IF ) supplies power to the digital interface. These supply voltages are connected to the demonstration board through the power pins. The board can also be controlled by a PC serial port (see Section.). The RS-3C PC signal levels are converted to I C levels by the level shifter block. The jumpers allow users to test and measure the STOTG04 characteristics without a USB OTG controller (see Section.3). The USB OTG controller header connector enables the user to connect a USB OTG controller (see CON3 pin) or any digital control system to the demonstration board. USB or USB OTG devices can be connected via the mini-ab connector (see Appendix A: STOTG04 demonstration board schematics). Figure. STOTG04 demonstration board block diagram Power Pins (V BAT, V IF ) DB-9 Serial Port Connector RS3C I C Level Shifters USB OTG Controller Header Connector I C signals INT, SUSPEND, DAT_VP, SE0_VM, RCV, VM, VP, RESET, SPEED, OE_TP_INT STOTG04 USB OTG Full-speed Transceiver V BUS, DP, DM, ID Mini-AB Connector Jumpers RESET AI879 3/3

4 STOTG04 demonstration board hardware UM0 Figure 3. Assembled demonstration board PCB Reset Jumpers Power pins USB OTG controller header connector Test points Jumpers Jumpers STOTG04 Transciver Test points RS-3 I C Level Shifter 4/3

5 UM0 STOTG04 demonstration board hardware Figure 4. Demonstration board layout. STOTG04 power requirements The recommended supply voltages of the transceiver are: V IF =.6 V to 3.6 V (V IF =.8 V, typ) V BAT =.7 V to 5.5 V (V BAT = 3.3 V, typ). The demonstration board was designed for these same voltage ranges. However, the board does not contain any voltage regulators, so if only one common supply voltage is used, the following range is recommended: V COMMON =.7 V to 3.6 V Note: Jumper J7 connecting the V BAT and V IF power supply pins has to be shorted (see Table ).. Connecting to a PC The STOTG04 demonstration board must be connected to the PC serial port via a non-crossed serial cable. The PC serial port can be selected in the USB OTG demonstration board software (see Chapter ). 5/3

6 STOTG04 demonstration board hardware UM0.3 Jumper assignments Table. Demonstration board jumper assignments () Jumper Related pin (s) Function J J J3 OE_TP_INT SUSPEND SPEED Short Enables the differential driver or I C mode (when TRANSP_EN Bit = ) Open Interrupt output when SUSPEND = 0 (J) and SUSPEND Bit = Short Disables power-down mode when SUSPEND Bit = Open Enables power-down mode when SUSPEND Bit = Short Open J4 V IF Short Open Enables low-speed mode operation Enables full-speed mode operation Provides power to the V IF pin. Can be used for current consumption measurement V IF pin is left floating J5 V BAT Short Open Provides power to the V BAT pin. Can be used for current consumption measurement V BAT pin is left floating J6 ADR Short Open The lsb of the I C address is '0' The lsb of the I C address is '' J7 V BAT, V IF Open V BAT V IF (use recommended V BAT and V IF ) Short V BAT = V IF (V COMMON must be 3.0 V V) J8 V TRM, V BAT Short Open Internal LDO regulator bypassed (usable only when the V BAT supply voltage is between 3.0 V and 3.6 V) Internal LDO regulator operational. See Figure 4. 6/3

7 UM0 STOTG04 demonstration board hardware.4 Connector assignments Table. Demonstration board connectors () Connector CON CON CON3 CON4 Descriptions Power supply pins (P7-P4): V BAT, V IF, and GND USB Mini-AB connector for USB/USB OTG devices Header connector for the USB OTG controller via the serial interface engine (SIE) signals (see Section.4.) DSUB-9 connector for the PC serial port used to control the transceiver through the I C bus. See Figure CON3 pin The USB OTG controller accesses the USBOTG04 s SIE through the CON3 connector and controls the following signals (see Table 3): DAT_VP SE0_VM RCV OE_TP_INT I C bus, and other main signals used by most types of OTG controllers. Warning: The Q and Q3 transistor bases MUST be connected to GND BEFORE the demonstration board is connected to the USB OTG controller. The Q and Q3 bases are connected to the R and R3 resistors (see Appendix A: STOTG04 demonstration board schematics). Table 3. CON3 pin assignments Pin No. Description Pin no. Description GND 8 SPEED Not connected 9 VM 3 SCL (I C clock signal) 0 OE_TP_INT 4 SDA (I C data signal) RVC 5 INT VP 6 RESET 3 DAT_VP 7 SUSPEND 4 SE0_VM 7/3

8 USB OTG demonstration software UM0.5 Reset switch (SW) The Reset switch (see Figure 3 and Figure 4) can be used to manually reset the STOTG04 hardware. The reset pulse can also be generated by the USB OTG controller via the CON3 RESET pin (see Table 3). USB OTG demonstration software The "USB OTG Demo" software controls the STOTG04 full-speed transceiver. The application requires a PC with at least one serial port, and any Windows operating system. Note: This software has been tested on Windows XP. The software configures and monitors the STOTG04 s internal registers. It sends and receives I C signals with RS-3C voltage levels via the serial port. The RS-3C PC signal levels are converted to the proper I C signal levels by the demonstration board s level shifter (see Chapter ).. Launching the software The USB OTG demonstration program does not require any installation.. Copy the "demo.exe" file to a destination folder or C:\temp directory. Double-click on the "demo.exe" file to launch the PC-to-demonstration board interface window 3. Use the RS-3C cable to connect the board to the PC (or confirm this connection if it is already set-up) 4. Select the correct PC serial port in the interface window (for example COM, COM, COM3 or COM4) 5. Select the STOTG04 address in the interface window (for example Ch or Dh). The default address is "Dh", which is equivalent to open jumper J6 (see Section.3: Jumper assignments) 6. Select the correct device version (STOTG04E or STOTG04ES) 7. Connect the correct supply voltage to the demonstration board.. PC-to-demonstration board communication Communication is controlled by two programming buttons (see Figure 5, bottom-right): Read all Write all. These buttons enable READs or WRITEs to all of the STOTG04 registers, otherwise the program cannot communicate with the STOTG04. Note: For correct use of the application and to prevent any anomalous behavior, it is important to understand the STOTG04 registers as well as the READ/WRITE sequence of the USB OTG demonstration program when multiple registers are changing at the same time. 8/3

9 UM0 USB OTG demonstration software.3 STOTG04 registers The STOTG04 has four types of registers (see Figure 5). Control registers Interrupt registers (source, latch, and falling/rising edges) Information registers (vendor ID and product ID) STOTG04 device address (Ch or Dh) registers. Note: Having a general knowledge of the registers may prevent certain anomalies. For example, if the J jumper is shorted and the "TRANSP_EN" bit has been set by mistake, the STOTG04 stops I C communication with the board because it is now in "Transparent I C" mode. The communication can be reinstated by opening J. Knowing the READ and WRITE sequence is important for using the interrupt registers, especially when multiple registers are changing at the same time. In these cases, the interrupt s "falling edge" and "rising edge" registers have the highest priority. For example, to monitor the VBUS_VLD interrupt (this is usually done when the charge pump is switched ON):. set the VBUS_VLD bit in the "rising edge" register and the VBUS_DRV bit in "Control Register". Click on the "Write All" button The register WRITE order (priority) is: "Write [Rising Edge (VBUS_VLD)]" THEN "Write [Control Register (VBUS_DRV)]". The user should always monitor the "Status" field to see if READ or WRITE operations are successful. Note that the TRANSP_EN bit in the control register and the V7_EN bit in the control register 3 are enabled only when the STOTG04E device version is selected. The "VendorID" and "ProductID" registers are read-only and provide the STOTG04 s identity. See the STOTG04 USB OTG full-speed transceiver datasheet for details. Figure 5. USB OTG demonstration user interface registers Control Interrupt source, latch, and falling/rising edges STOTG04 information (read-only) STOTG04 device version STOTG04 device address Serial port address field Control buttons Note: These are STOTG04 register settings after the first "Read All" instruction. 9/3

10 STOTG04 demonstration board schematics UM0 0/3 Appendix A STOTG04 demonstration board schematics Figure 6. STOTG04 demonstration board schematics TIN TIN 0 RIN 3 RIN 8 C+ C- 3 C+ 4 C- 5 V+ V- 6 TOUT 4 TOUT 7 ROUT ROUT 9 GND 5 VCC 6 U ST33 VBUS D- D+ 3 ID 4 GND 5 S0 6 S 7 S 8 S3 9 CO USB VIF 4 ADR SDA SCL 3 RESET/ 4 INT/ 5 SPEED 6 SUSPEND 8 VM 0 VP RCV OE_TP_INT/ 9 SE0_VM 3 DAT_VP 4 GND 7 VBAT 0 CAP CAP VBUS 9 D- 5 D+ 6 ID 8 VTRM 7 CGND 3 U STOTG04E Q STR5 Q STR5 Q3 STR5 C9 00nF C0 00nF C 00nF C3 00nF C7 µf C 0nF C3 00nF C4 4.7µF C5 00nF C6 4.7µF C µf C8 00nF C 00nF R 47k R4 470 R5 470 R 47k R6 470 R3 47k R9 0k R7 R8 R0 0k R 0k R 47k R3 0k CON3 USB OTG Controller CON4 DB9 P4 CON P CON P6 CON P CON P3 CON P5 CON P8 CON P9 CON P0 CON P4 CON P3 CON P CON P CON P7 CON P5 CON P6 CON P7 CON P8 CON SW RESET J7 J J J3 J6 J J J4 J5 R4 0k VIF scl int/ suspend DAT_VP RCV VM sda reset/ speed oe_tp_int/ SE0_VM VP adr VBAT VIF VBUS DM DP ID VBAT VBAT VIF VBAT VIF sda scl VIF reset/ VIF DM DP ID VBUS VBAT adr sda scl reset/ int/ speed suspend VM VP RCV oe_tp_int/ SE0_VM DAT_VP VTRM VBAT-U VIF-U D- D+ DSR RTS DTR

11 UM0 Appendix B STOTG04 demonstration board bill of materials STOTG04 demonstration board bill of materials Table 4. STOTG04 bill of materials Part type Qty Designator Footprint ST33 U SO-6 STOTG04 U QFN-4 00 nf ±0% 8 C3, C5, C8, C9, C0, C, C, C µf ±0%/6 V/X7R (high cap ceramic) C, C nf ±0%/5 V/X7R C ,7 µf ±0%/6.3 V/X5R (high cap ceramic) C4, C kω ±5% 4 R, R, R3, R Ω ±5% 3 R4, R5, R Ω ±5% R7, R kω ±5% 5 R9, R0, R, R3, R Jumper 6 J, J, J3, J6, J7, J8 Thru-hole Header 8 P-P8 Thru-hole Header 7x CON3 Thru-hole DSUB-9 (male) CON4 Thru-hole Switch SW Thru-hole MINI USB-AB receptacle CON USB mini A-B STR5 3 Q, Q, Q3 SOT-3 /3

12 Revision history UM0 Revision history Table 5. Document revision history Date Revision Changes -Jun-006 Initial release 9-Nov-008 Modified: Figure 5 /3

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