HP vc4815 Service Reference Guide:HP Compaq vc4815 Thin Client - Page 24
Appendix A, HP Compaq vc4815
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Appendix A HP Compaq vc4815 HP Compaq vc4815 4 引脚 1) 辅口1 (串口2) 辅口2 (串口3) (TTL) 辅口3 (串口4) 1脚 DCD/ +5V +5V / DCD +5V / DCD +5V / DCD 2脚 RXD RXD RXD/TXD RXD 3脚 TXD TXD TXD/RXD TXD 4脚 DTR/ +12V DTR/+5V /+12V NC/DTR DTR/+5V /+12V 5脚 GND GND GND GND 6脚 DSR DSR NC/DSR DSR 7脚 RTS/+12V RTS/+12V NC/RTS RTS/+12V 8脚 CTS/RXD (TTL) 9脚 RI/TXD (TTL) CTS RXD/TXD(TTL) CTS RI TXD/RXD(TTL) RI
Appendix A
HP Compaq vc4815
系列串口定义用户指南
HP Compaq vc4815
终端默认具有
4
个串口,分别为串口一、串口二,串口三、
串口四。
定
义
引脚
主口
(串口
1
)
辅口
1
(串口
2
)
辅口
2
(串口
3
)
(
TTL
)
辅口
3
(串口
4
)
1
脚
DCD/ +5V
+5V
/ DCD
+5V
/ DCD
+5V / DCD
2
脚
RXD
RXD
RXD/TXD
RXD
3
脚
TXD
TXD
TXD/RXD
TXD
4
脚
DTR/ +12V
DTR/+5V /+12V
NC/DTR
DTR/+5V /+12V
5
脚
GND
GND
GND
GND
6
脚
DSR
DSR
NC/DSR
DSR
7
脚
RTS/+12V
RTS/+12V
NC/RTS
RTS/+12V
8
脚
CTS/RXD
(
TTL
)
CTS
RXD/TXD(TTL)
CTS
9
脚
RI/TXD
(
TTL
)
RI
TXD/RXD(TTL)
RI