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KRC-1054R
18
CIRCUIT DESCRIPTION
7-3. Terminals required for control
(1) System controller
| Name
|
1/0
Contents
Panel power supply terminal.
When the panel is attached, supplies power to the panel for initial start-up of the Panel p-COM.
Interlocked with the RESET terminal of the Pane! p-COM.
PANIN
Terminal for detecting that the panel is attached on the head unit.
Peer
PANCON must be turned OFF while the panel is not attached.
Stop request to Panel u-COM. When power or Acc is turned OFF, sets the Panel p-COM to the stop status in
order to reduce the Back Up current. As the Panel u-COM inhibits the LCD driver at the positive going of this
terminal, the LCD display disappears for 1 second when this output is dropped for a moment.
Therefore, to cope with possible terminal contact failure, this terminal is provided with a time constant of 20 to
30 ms in the hardware. In case the output from this terminal is dropped, the System Controller should take this
time constant in consideration and wait to ensure before restarting.
Key data send request from Panel p-COM.
P_CLK
Clock output to Panel p-COM.
Key data input from Panel p-COM.
Stop request input, which sets the Panel p-COM immediately in the stop status. Even in stop status, key codes
of certain keys continue to be transferred.
Key data send request to System Controller.
Clock from System Controller.
Key data output to System Controller.
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