Contec SIS-8601-LVA - Page 33

3 Jumper Setting
26
SIS-8601-LVA
3.3.2 RS-485 Setting
RTS#
JP9: 7-8
TXD
JP10: 7-8
JP10: 5-6
D
R
RXD
COM2
1
2
3
4
5
6
7
8
9
JP9: 5-6
JP9: 4-6
120Ω
120Ω
DATA-
DATA+
I/O addresses and instructions
The table below lists I/O addresses for use as COM2.
I/O address DLAB Read/Write Register
W Transmitter holding Register THR
0
R Receiver buffer Register RBR
02F8H
1 W Divisor latch Register (LSB) DLL
1 W Divisor latch Register (MSB) DLM
02F9H
0 W Interrupt enable Register IER
02FAH X R Interrupt ID Register IIR
02FBH X W Line control Register LCR
02FCH X W Modem Control Register MCR
02FDH X R Line status Register LSR
02FEH X R Modem Status Register MSR
02FFH X R/W Scratch Register SCR