4. Each Component Function
BX-2x0-DCxxxx, BX-2x0D-DCxxxx User’s manual
27
Serial Port Interface: SERIAL A, B
SERIAL A, B (RS-232C Ports)
The product has 2 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 5 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.)
Please refer to “Chapter 6 I/O Port Addresses”
for more information on I/O address and register
function.
Table 4.7. SERIAL A, B, C, D, E I/O Addresses and Interrupts
SERIAL
I/O address
Interrupt
1 3F8h
-
3FFh
IRQ 4
2
2F8h - 2FFh
IRQ 3
TPSerial*1 2A7h-2AFh
IRQ5
RS485/422*2 2B0h-2B7h IRQ6
*1 Set as Disable when shipped. Not available since it is for the reserved device for the functional expansion in future.
The I/O address is fixed and can not be changed.
*2 Settings are fixed and cannot be changed.
Table 4.8. 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
Содержание bx200 SERIES
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Страница 27: ...3 Hardware Setup 20 BX 2x0 DCxxxx BX 2x0D DCxxxx User s manual ...
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