UM0212 datasheet(7/13 Pages) STMICROELECTRONICS

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UM0212

STOTG04 demonstration board hardware

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1.4

Connector assignments

1.4.1

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

●

I2C bus, and

●

other main signals used by most types of OTG controllers.

Warning:

The Q1 and Q3 transistor bases MUST be connected to GND

BEFORE the demonstration board is connected to the USB OTG

controller. The Q1 and Q3 bases are connected to the R1 and R3

resistors (see Appendix A: STOTG04 demonstration board

schematics).

Table 2.

Demonstration board connectors(1)

See Figure 4.

Connector

Descriptions

CON1

Power supply pins (P7-P14): VBAT, VIF, and GND

CON2

USB Mini-AB connector for USB/USB OTG devices

CON3

Header connector for the USB OTG controller via the serial interface engine (SIE)

signals (see Section 1.4.1)

CON4

DSUB-9 connector for the PC serial port used to control the transceiver through the I2C

bus

Table 3.

CON3 pin assignments

Pin No.

Description

Pin no.

Description

GND

SPEED

Not connected

SCL (I2C clock signal)

OE_TP_INT

SDA (I2C data signal)

RVC

5INT

RESET

DAT_VP

SUSPEND

SE0_VM

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