Ascii Unit Internal Configuration - Omron C500-ASC04 Operation Manual

ASCII Unit Internal Configuration

1-3 ASCII Unit Internal Configuration
PC
I/O Bus
CPU
LED Indicators
DIP Switches
6
The Common Memory can be accessed using the ASCII Unit's PC READ or PC
WRITE statements. It can also be accessed using the PC's WRIT(87/191) and
READ(88/190) instructions. I/O data can be accessed using the ASCII Unit's PC
GET, PC PUT, and ON PC statements. It can also be accessed using the
MOV(21/030) instruction.
The following figure illustrates these instructions and their relationship to the
Common Memory and the I/O data.
ASCII Unit
Common
Memory
Interface
Circuit
I/O Data
EEPROM
I/O
RESET
START
/STOP
Section 1-3
CPU
System
Memory
Work
Memory
BASIC
Program
Memory
BASIC Data
Memory
RS-232C
RS-232C
Interface
Port 1
Connectors
RS-232C
Interface
Port 2