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Parallel mode operation
When parallel mode is selected, input/output is made through
the parallel port only.
Any
data
input
to the
serial port
will be ignored.
(1)
Data output (handshaking)
PDO 0-N
s
PDO
7 - N
(OUTPUT)
PDOSTRB-N
(OUTPUT)
PDi 7-N
(INPUT)
~~iJS
•
i
I
MIN.
MIN •.
I
I
58us MIN.
Fig.
3. 3 .1
Remarks
8-bit negative logic
output data
DATA STROBE
l
ACKNOWLEDGEMENT by
external device
NOTE:
If handshaking is
not used,
PDOSTRB-N (pin 25)
and PDi7-N
(pin
21)
should
be shorted.
(2)
Command
input
(handshaking)
PDI6-N
s
PDIO-N
(input)
PDISTRB-N
(input)
J
valid'. data
~{%I§:/iii~
I
'--~-
!
H~
Remarks
7-bit negative logic
command
data
Both edges cause
interruption
---- . . . . . . - - , ---r
PDIACCEPTBL~-~N__.___.,____..........,
(output)
60us MIN
I
MAX
t
Data acquisition
Fig. 3.3.2
*
If handshaking is not required, tl must be greater
than 80 µs.
- 11 -
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