PT-S959SDHX / PT-S959SDHXC Series User’s Manual
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Serial Port Interface: SERIAL A, B, C, D
The product has 4 channels of RS-232C compliant serial ports supporting up to a baud rate of
115,200bps with a 16-byte transmission-dedicated data buffer and a 16-byte reception-dedicated data
buffer. You can use “Chapter 4 BIOS Setup” to configure an I/O address, interrupt and unused state
for each of the ports independently. (The same I/O address and IRQ cannot be shared with any other
device.)
Table 4.10. SERIAL A, B, C, D, I/O Addresses and Interrupts
SERIAL
I/O address
Interrupt
A
3F8h - 3FFh
IRQ 4
B
2F8h - 2FFh
IRQ 3
C
2D0h -2D7h
IRQ10
D
2E0h -2E7h
IRQ11
Table 4.11. SERIAL Port Connector
Connector type
9-pin D-SUB (MALE)
Pin No. Signal name
Meaning
Direction
1
CD
Carrier detect
Input
2
RD
Received data
Input
3
TD
Transmitted data
Output
4
DTR
Data terminal ready
Output
5
GND
Signal ground
-----
6
DSR
Data set ready
Input
7
RTS
Request to send
Output
8
CTS
Clear to send
Input
9
RI
Ring indicator
Input
