Serial port 1-4 connector (com1-4) – Avalue EPS-QM87 User Manual

Page 30

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EPS-QM87

30 EPS-QM87 Quick Reference Guide

2.4.17

Serial port 1-4 connector (COM1-4)

Signal

PIN PIN

Signal

UDCDA#

1

2

USINA

USOUTA

3

4

UDTRA#

GND

5

6

UDSRA#

URTSA#

7

8

UCTSA#

URI1

9

10

NC

UDCDB#

11

12

USINB

USOUTB

13

14

UDTRB#

GND

15

16

UDSRB#

URTSB#

17

18

UCTSB#

URI2

19

20

NC

DCD3

21

22

RxDD3

TxDD3

23

24

DTR3

GND

25

26

DSR3

RTS3

27

28

CTS3

URI3

29

30

NC

DCD4

31

32

RxDD4

TxDD4

33

34

DTR4

GND

35

36

DSR4

RTS4

37

38

CTS4

URI4

39

40

NC