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7 CIRCUIT OPERATIONS
7.1. KEY INPUT CONTROL CIRCUIT
(1) CIRCUIT OPERATION
Sequential input information (negative logic) from the DSHS proprietary telephone is executed by dynamic scanning.
The ports P10 to P14 of IC2 are brought to low status consecutively.
If a key is pressed, the key-in information input is executed by portS P50 to P56.
The ports P10 to P14 of IC2 are brought to low status consecutively.
If a key is pressed, the key-in information input is executed by portS P50 to P56.
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KX-T7565RU
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