2.4.19
Serial port 1 connector (JCOM1)
2.4.20
Serial port 2 connector (JCOM2)
Quick Reference Guide
Signal
PIN PIN
COM_DCD#1
1
COM_TXD1
3
GND
5
COM_RTS#1
7
COM_RI#1
9
Signal
PIN PIN
COM_DCD#2
1
COM_TXD2
3
GND
5
COM_RTS#2
7
COM_RI#2
9
HPS-621U2A Quick Reference Guide 27
Signal
2
COM_RXD1
4
COM_DTR#1
6
COM_DSR#1
8
COM_CTS#1
10
NC
Signal
2
COM_RXD2
4
COM_DTR#2
6
COM_DSR#2
8
COM_CTS#2
10
NC