Omron SYSMAC C200H-ASC02 Operation Manual page 141

ASCII Unit Memory Map
Communication Flags
Communication Input Flags
7 6
___ ___ ___
Address
$0015
CTS1
DSR2
Communication Output Flags
7 6
Address
$0003
BANK2 BANK1 WDREF
5 4 3
____
BAT
START
1
____
DSR1
LOW
/
STOP
5 4 3
___
TXD1 RXD1
RTS1
2 1 0
___ ___
IRQ2 IRQ1
Port for interrupts from ACIA and PTM
Port for interrupts from START/STOP
switch and PC
0 when START/STOP switch is ON
Normally 1
1 when battery voltage drops
Port 1 DSR signal, active low
Port 2 DSR signal, active low
Port 1 CTS signal, active low
2 1 0
___ ___
DTR2 DTR1
Port 1 DTR signal, active low
Port 2 DTR signal, active low
1 RTS signal, active low
1 receive data
Port 1 transfer data
Watchdog timer refresh port
Bank ports (Do not change
these ports.)
Appendix E
137