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Communications (Serial and Parallel)
16.9
Switching the Display Camera
16.9.4
Using Parallel Input to Switch the Display Camera
Parallel port in Easy Mode
Data input port
Data output port
Timing chart for camera switching in Easy Mode
/READY
ON
READY signal
Camera
/IN7
OFF
switch input
ERROR signal
/ERROR
OFF
(A): With the READY signal on, input IN7 from the external device.
(B): The falling edge (off to on) of IN7 is detected, and the READY signal goes off.
(C): After the camera has switched, the READY signal goes on (if a display switch error
is generated, the ERROR flag goes on at the same time as the READY signal).
16 − 52
IN7 = Timing for switching the display camera
READY = Ready signal
Data output port ERROR = Error flag
OFF
(B)
(A)
ON
(C)
OCR Type A230
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