Usb; Rs232, Rs-485 And Irda; Table 11. Rs232, Rs485 And Irda Related Jumpers - ST STM32303C-EVAL User Manual

Hardware layout and configuration
2.7

USB

The STM32303C-EVAL evaluation board supports USB2.0 compliant full speed
communication via a USB type B connector (CN12). The evaluation board can be powered
by this USB connection at 5 V DC with 500 mA current.
A USB disconnection simulation can be implemented by controlling the 1.5 K pull-up resistor
on the USB+ line and by detecting the 5 V power on the USB connector (CN12) via a
resistor connected to PB8.
USB will work properly when VDD > 3 V.
2.8

RS232, RS-485 and IrDA

The RS232, RS-485 and IrDA communication is supported by D-type 9-pin RS232/RS-485
connectors (CN8) and IrDA transceiver (U10) which is connected to USART1 of
STM32F303VCT6 on the STM32303C-EVAL evaluation board. Bootloader_RESET &
Bootloader_BOOT0 signals are added on the RS232 connector (CN8) for ISP support.
Table 11.
Jumper
The RS485 communication is supported by the RS485 transceiver, ST3485EBDR, which is
connected to pin4 and pin9 of D-type 9-pin connectors CN8 (share the same connector with
USART1).
16/58
RS232, RS485 and IrDA related jumpers
RS232_RX is connected to the RS232 transceiver
and the RS232 communication is enabled when JP13
is set as shown to the right (default setting):
RS485_RX is connected to the RS485 transceiver
JP13 and the RS485 communication is enabled when JP13
is set as shown to the right:
IrDA_RX is connected to the IrDA transceiver and the
IrDA communication is enabled when JP13 is set as
shown to the right:
Doc ID 023581 Rev 2
Description
UM1567
Setting