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MSM6896 Datasheet(PDF) 11 Page - OKI electronic componets |
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MSM6896 Datasheet(HTML) 11 Page - OKI electronic componets |
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11 / 43 page  ¡ Semiconductor MSM6895/6896 11/43 PO0, PO1, PO2, PO3, PO4, PO5, PO6, PO7 Key scanning outputs. These output pins need external pull-up resistors because of their open- drain circuits. Through processor control, these outputs can be set open or to digital "0". Initially, these outputs are set at an opened state. PI0, PI1, PI2, PI3, PI4, PI5, PI6, PI7 Key scanning inputs. In the READ mode, data on PI0 to PI7 can be read out of the processor via data bus (DB0 to DB7). INTT Interrupt signal output to the processor. INTT outputs interrupt signals (digital "0") at intervals of 8 ms by the interrupt release control signal from the processor. INTT does not output any signal while no CK8 signal is input. Interrupt release signal from processor INTT output t < 8 ms 8 ms < t < 16 ms t < 8 ms 8 ms 16 ms 8 ms DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7 Data bus inputs and outputs. |
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