Communications Methods; Eeprom Batteryless Data Carrier Check - Omron V600-CA8A-V Series Operation Manual

Communications Methods

3-2-5 EEPROM Batteryless Data Carrier Check

3-3

Communications Methods

Command Reception
1, 2, 3...
Response Transmission
1, 2, 3...
24
Unlike the V600-CA1A-Vj or V600-CA2A-Vj Serial Interface ID Controller, the
MDL command (which manages the number of overwriting operations) cannot
be used with the DC that incorporates EEPROM (batteryless-type DC). To keep
a record of the number of overwriting operations on the Parallel Interface ID
Controller, the user should use the write or auto write command to increase the
number of overwriting operations.
Communications between the PC and the ID Controller are performed using a
parallel bus with a total of 32 lines, and one byte of data is transmitted per com-
munication cycle.
PC
OUT
Output
Unit
1. A clock signal with a fixed on/off cycle is output, indicating the timing for com-
munications to the ID Controller.
2. The ID Controller is informed of command execution.
3. Command type and the number of the antenna to be accessed are speci-
fied.
4. Address data is output. The address range is 256 bytes between 00 and FF
within the page specified by the DIP switch.
5. When executing an auto write command, the data to be written to the DC is
specified.
PC
IN
Input
Unit
1. Response data (read: read data, write: end code) obtained when command
executed is output to the PC.
2. PC is informed of establishment of response data resulting from execution
of the command.
RS1 line: Head 1
RS2 line: Head 2
ID Controller
Host Strobe
Command Execute CEXE
Control
Address
Write Data
ID Controller
RD0
Response Data
RD7
RS1, 2
Response Strobe
Error
Section
1.
IN
HS
2.
CO
3.
to
C2
AD0
to
4.
AD7
WD0
to 5.
WD7
OUT
to
1.
2.
ERR
3.
3-3