ML2110 Datasheet, PDF (82/101 Pages) OKI electronic componets – Speech Control Processor

OKI Semiconductor
FEDL2110-01
ML2110
(B) External operation
1) Verify that the input buffer full output (PIBF) is "0".
2) Drive the parallel input/output bus (PD[7:0]) with input data.
3) Set the strobe input (PSTB) to "1". This writes the data to the input buffer PIB.
4) When the input buffer full output (PIBF) becomes "1", stop driving the parallel input/output bus and set the
strobe input (PSTB) to "0".
5) Repeat the operation from step 1).
5.2.2 Data Output to External Device
(A) SCP operation
1) Write "01" to the PCMD (Command Register) PMOD bits. Also write "1" to PCMD’s POEN bit to enable
output operation.
2) Verify that the PSTS (Status Register) POST bit is "1", indicating that the output buffer POB is empty.
3) Write data to the output buffer POB.
4) Write "0" to PSTS’s POST bit. When POST becomes "0", the output buffer full output (POBF) will become
"1".
5) If PSTS’s POST bit is "1" and output buffer full interrupts have been enabled (PCMD’s POIE bit is "1"), then a
PIO interrupt to the CPU core will be generated. This interrupt will be released by writing "0" to PSTS’s POST bit
or writing "0" to PCMD’s POIE bit.
6) Write data to the output buffer POB and repeat the operation from step 4).
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