Schematics
UM1460
54/67
DocID022136 Rev 5
Figur
e 26
. RS-23
2
and
IrDA
1
1
2
2
3
3
4
4
D
D
C
C
B
B
A
A
STMicroelectronics
Title:
Number:
Rev:
Sheet
of
C.3(PCB.SCH)
Date:
7/20/2016
RS232/IrDA_TX
RS232/IrDA_RX
SD
5
TxD
3
GND
8
Anode
(VCC2)
1
Cathode
2
RxD
4
VCC1
6
NC
7
U11
T
F
DU6300
R64
5
R63
47
C51
0.1uF
C52
0.1uF
+3V3
C55
4.7uF
C45
4.7uF
IrDA
3
2
1
JP2
2
M
B786
10
20
STM32
20-21-45-46
G-EVAL
RS232&IrDA
C2+
1
C2-
2
V-
3
R1IN
4
R2IN
5
R3IN
6
R4IN
7
R5IN
8
T1OUT
9
T2OUT
10
T3OUT
11
T3IN
12
T2IN
13
T1IN
14
R5OUT
15
R4OUT
16
R3OUT
17
R2OUT
18
R1OUT
19
R2OUTB
20
R1OUTB
21
nSHDN
22
nEN
23
C1-
24
GND
25
VCC
26
V+
27
C1+
28
U17
ST3241EBPR
C78
100nF
C80
100nF
C76
100nF
C77
100nF
C79
100nF
+3V3
1
6
2
7
3
8
4
9
5
CN16
DB9-m
ale
UART3
or
4
+3V3
Bootloader_BOOT0
Bootloader_RESET
P
C10
P
C11
RXD
TXD
CTS
DSR
T
F
DU6300
(U11)
is
not
populated
on
boards
manufactured
starting
from
m
iddle
2016
(schematics
revision
C.3)
Note:
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