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User Manual
GD32150R-EVAL
7
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17
4.5
USART1
Figure 5. Schematic diagram of USART1 function
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
T2OUT
7
R2IN
8
R2OUT
9
T2IN
10
T1IN
11
R1OUT
12
R1IN
13
T1OUT
14
GND
15
VCC
16
U5
MAX
+3V3
GND
C26
50V/0.1uF
C28
50V/0.1uF
C27
50V/0.1uF
C25
50V/0.1uF
C24 50V/0.1uF
GND
1
6
2
7
3
8
4
9
5
J2
COM1
GND
RS232
RS232_TX
RS232_RX
RS232_TX
RS232_RX
PA9
PA10
4.6
RS-485
Figure 6. Schematic diagram of RS-485 function
RO
1
RE
2
DE
3
DI
4
GND
5
A
6
B
7
Vcc
8
U6
ST485ABDR
RS485
R38
120R
1
2
JP9
HEADER 2
C29
50V/0.1uF
+3V3
GND
GND
RS485_DIR
RS485_RX
RS485_TX
PA2
PA3
RS485_DIR