msm7630 Oki Semiconductor, msm7630 Datasheet - Page 81

• Manufacturer Part Number: msm7630
• Description: Universal Speech Processor
• Manufacturer: Oki Semiconductor

¡ Semiconductor
(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
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
2) Verify that the PSTS (Status Register) POST bit is "1", indicating that the output buffer POB is
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
5) If PSTS’s POST bit is "1" and output buffer full interrupts have been enabled (PCMD’s POIE bit
6) Write data to the output buffer POB and repeat the operation from step 4).
and set the strobe input (PSTB) to "0".
enable output operation.
empty.
become "1".
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.
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