AAEON PCM-5895 Rev.B - Manual (Page 35)

C o m p a c t B o a r d P C M - 5 8 9 5 R e v . B
Chapter 2 Quick Installation Guide 2- 22
Port 4 CN18. pin 4 Bit 4 U40. pin 23 (GPIO24)
Port 5 CN18. pin 5 Bit 3 U40. pin 24 (GPIO23)
Port 6 CN18. pin 6 Bit 2 U40. pin 25 (GPIO22)
Port 7 CN18. pin 7 Bit 1 U40. pin 26 (GPIO21)
Port 8 CN18. pin 8 Bit 0 U40. pin 27 (GPIO20)
2.28 Serial Port (CN19)
Note: COM 1 & COM 2 support full modem control signals and COM 3 &
COM 4 support TX & RX only.
COM/ RS-232 mode
Pin Signal Pin Signal
1 DCD1 2 DSR1
3 RXD1 4 RTS1
5 TXD1 6 CTS1
7 DTR1 8 RI1/+5V/+12V
9 GND 10 NC
11 DCD2 12 DSR2
13 RXD2 14 RTS2
15 TXD2 16 CTS2
17 DTR2 18 RI2/+5V/+12V
19 GND 20 NC
21 NC 22 NC
23 RXD3 24 NC
25 TXD3 26 NC
27 NC 28 +5V/+12V