5-3
Section
Write Operation in AUTO Mode
66
5-3
Write Operation in AUTO Mode
In AUTO mode, either 16-bit or 8-bit data is written in any of the following three
write modes: BYTE mode, BIT SET mode, and BIT CLR (clear) mode. In BYTE
mode, the data is written just as it is. In BIT SET mode, only certain bits are
turned ON. In BIT CLR mode, only certain bits are turned OFF. Since the basic
timing chart is the same for these modes, this section describes only the BYTE
mode as a reference example.
Data Carrier position
Data Carrier accessed
Address input
INHIBIT input
HS output
NORMAL output
R/W input
ERROR output
Data output
Data input
Data LED indicators
Address designation input
All 0
Previous data
output
None
lit
Data (1) display
Write executed (1)
Read executed (2)
Read executed (3)
All 0
All 0
None
lit
Data (2) error
display
None
lit
Data (3) display
t
auto
Inside the area
Inside the area
Outside the area
(DC detected)
(DC de-
tected)
(DC de-
tected)
(DC detected)
All 0
All 0
All 0
Read data (1)
Read data (2)
Read data (3)
“1”
The output time t
auto
is the time that the Data Carrier is in the transmission area.
If this time (t
auto
) is shorter than the output time set by pin 1 of DIP switch 2 (out-
put mode), the output will continue until this time is reached. (When the DIP
switch pin is OFF, the output time is 100 ms; when ON, the output time is
500 ms.)