COM Header
There is one COM header (JCOM1) on the A4SAP-H motherboard.
For a detailed diagram of the A4SAP-H motherboard, see the layout under Motherboard Quick Reference.
|
COM Header Pin Definitions: 19 Total |
|||
|---|---|---|---|
|
Pin# |
RS232 |
RS422/485 |
RS485 |
|
1 |
SP_DCD1 |
TX-1 |
Data-1 |
|
2 |
SP_DSR1 |
|
|
|
3 |
SP_RXD1 |
TX+1 |
Data+1 |
|
4 |
SP_RTS1 |
|
|
|
5 |
SP_TXD1 |
RX+1 |
|
|
6 |
SP_CTS1 |
|
|
|
7 |
SP_DTR1 |
RX-1 |
|
|
8 |
SP_R11 |
|
|
|
9 |
GND |
|
|
|
10 |
No Connection |
||
|
11 |
SP_DCD2 |
TX-2 |
Data-2 |
|
12 |
SP_DSR2 |
|
|
|
13 |
SP_RXD2 |
TX+2 |
Data+2 |
|
14 |
SP_DTS2 |
|
|
|
15 |
SP_TXD2 |
RX+2 |
|
|
16 |
SP_CTS2 |
|
|
|
17 |
SP_DTR2 |
RX-2 |
|
|
18 |
SP_RI2 |
|
|
|
19 |
SP_GND |
|
|