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18
3.11 Serial Port Connectors
The
3308520/
offers
NS16C550
compatible
UARTs
with Read/Receive 16-byte FIFO serial ports and internal 2x20
header and RS-422/485 connector.
CN19: COM 1~COM 4 Connector (2x20 Header)
PIN Description PIN Description
1
DCD1
2
DSR1
3
RXD1
4
RTS1
5
TXD1
6
CTS1
7
DTR1
8
RI1
9
GND
10
N/C
11
DCD2
12
DSR2
13
RXD2
14
RTS2
15
TXD2
16
CTS2
17
DTR2
18
RI2
19
GND
20
N/C
21
DCD3
22
DSR3
23
RXD3
24
RTS3
25
TXD3
26
CTS3
27
DTR3
28
RI3
29
GND
30
N/C
31
DCD4
32
DSR4
33
RXD4
34
RTS4
35
TXD4
36
CTS4
37
DTR4
38
RI4
39
GND
40
N/C
1 2
39 40
CN15: RS-422/485 Connector (3x2 Header, COM4)
PIN Description PIN Description
1
TX-
2
TX+
3
RX+
4
RX-
5
GND
6
VCC
1
5
6
2
NOTE:
The terminal resistance of RX & TX is set at 180
Ω
.
Содержание 3308520
Страница 4: ......
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Страница 11: ...5 1 3 Board Dimensions ...
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Страница 16: ...10 3 2 Board Layout Top Side Solder Side ...