3.11 Serial Port Connectors
The HS-6252 offers two NS16C550 compatible UARTs with
Read/Receive 16-byte FIFO serial ports and two internal 10-pin
headers.
ꢂ CN9, CN8, CN5 and CN6: COM1/COM2/COM3/COM4
Connectors (5x2 Header)
PIN
Description
PIN
Description
1
3
5
7
9
DCD
RXD
TXD
DTR
GND
2
4
DSR
RTX
CTX
RI
6
8
10
N/C
ꢂ CN10: RS-422/485 Connector (5x2 Header)
PIN
Description
TX-
PIN
Description
1
3
5
7
9
2
TX+
RX-
RTS-
CTS+
N/C
RX+
4
GND
6
RTS+
8
CTS-
10
ꢂ JP7: RS-422/485 Transceiver Enabled/Disabled Select
Options
Settings
Always Enable
Short 1-2
Short 3-4
Short 5-6
OPEN
Enable by “-RTS” signal
Enable by writing the REG:2 EFH BIT0=1
* Always Disabled
ꢂ JP8: RS-422/485 Receiver Enabled/Disabled Select
Options
Settings
Always Enable
Enable by “-RTS” signal
* Always Disabled
Short 1-2
Short 3-4
OPEN
ꢂ JP9: COM2 use RS-232 or RS-422/485 Selection
Serial Port Setting
JP9
* RS-232
OPEN
SHORT
RS-422/485
15
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