msm6895 Oki Semiconductor, msm6895 Datasheet - Page 11

• Manufacturer Part Number: msm6895
• Description: Multi-function Pcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
MSM6895/6896
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
t < 8 ms
8 ms < t < 16 ms
t < 8 ms
from processor
INTT output
8 ms
16 ms
8 ms
DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7
Data bus inputs and outputs.
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