67
9
OPTION INTERFACE
67
OPT
ION INT
E
RFA
C
E
Chapter
9
■
Logic switching
Select the logic of the BCD data output signal. Make selection with B14.
When COM and B14 are open
：
Negative logic
When COM and B14 are short-circuited
：
Positive logic
Read at least 2 cycles after inputting the logic switching.
■
BCD data hold
Updating of the BCD data output signal is stopped. Also, the STROBE output turns OFF.
Make selection with A14.
When COM and A14 are open
：
Update stop canceled
When COM and A14 are short-circuited
：
Update stopped
Read at least 2 cycles after inputting the BCD data hold.
As long as the BCD data hold is input, data can be read reliably, but because the data is not updated,
it may be different from original data.
BCD data
OVER
Strobe range
STROBE
0
1
0
1
STAB
（
duty 50%
）
Update
BCD data
OFF
ON
BCD
1cycle
1cycle(max)
Updating is stopped.
0
1
STROBE
data hold
Summary of Contents for F350
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