Figure 28. Stm32091C-Eval Rs232, Rs485 And Irda - ST STM32091C-EVAL User Manual

USART1_RTS_3V3
Bootloader_BOOT0_3V3
Bootloader_RESET_3V3
PA11 R68 0
USART1_CTS_3V3
USART1_TX_3V3
JP13
6 5
PA10
USART1_RX_3V3 4 3
2 1
Header 3X2
VDD_IO2
R53 R49
100K 100K C13 VDD_IO2
100nF 1
PA9 R52 0 2
USART1_TX
PA12 R50 0 3
USART1_RTS
4

Figure 28. STM32091C-EVAL RS232, RS485 and IrDA

+3V3
100nF
C23 U7 C26
28 26 100nF
C1+ VCC
24 25
C1- GND
C21 1 27 C22
C2+ V+
100nF 2 3 100nF
C2- V-
C20
14 9 100nF
T1IN T1OUT
13 10
T2IN T2OUT
12 11
T3IN T3OUT
21
R1OUTB
20
R2OUTB
19 4
R1OUT R1IN
18 5
R2OUT R2IN
17 6
R3OUT R3IN
16 7
R4OUT R4IN
15 8
R5OUT R5IN
+3V3
23 22
nEN nSHDN
ST3241EBPR
C14
U5 +3V3 100nF
8
VCCA VCCB
7 USART1_TX_3V3
A1 B1
6 USART1_RTS_3V3
A2 B2
5 RS485_DIR
GND DIR VDD_IO2
SN74LVC2T45DCUT
CN9
DB9-male USART2
1
DSR 6 USART1_RTS_3V3
RXD 2 RS485_DIR
RTS 7
TXD 3
CTS 8
4 R72
9 10K
5
connector for USART2 & RS485
R88
0
+3V3
R80 5.1
R89 47
C41
C47
4.7uF
100nF
C45
C46
4.7uF
100nF
Title: RS232 & RS485 & IrDA
Project: STM32091C-EVAL
Size: A4
Date: 7/25/2014
U12 +3V3
SB15
R76 22K
1 8
RO Vcc
2 7
RE B
3 6
DE A
R84 22K
4 5
DI GND
SB18
ST3485EBDR
C40
SB19
R79
120
100nF
SB16
U14
5
SD
3
TxD
4
RxD
1
Anode (VCC2)
2
Cathode
6
VCC1
7
Vlogic
8
GND
TFDU6300
IrDA
Reference: MB1169 Revision: B.1
Sheet: 8 of 14