參數(shù)資料
型號(hào)： MSM7630
廠商： OKI SEMICONDUCTOR CO., LTD.
英文描述： Universal Speech Processor(通用語音處理器)
中文描述： 通用語音處理器（通用語音處理器）
文件頁數(shù)： 76/89頁
文件大?。?/td> 430K
代理商： MSM7630
MSM7630
Semiconductor
76/89
(B)External operation
1) Verify that the output buffer full output (POBF) is "1".
2) Set the acknowledge input (
PACK
) to "1". When the acknowledge input is set to "1", the PIO will
output the value of the output buffer (POB) to the parallel input/output bus (PD[7:0]).
3) Verify that the output buffer full output (POBF) is "0".
4) Read the value on the input/output bus.
5) Set the acknowledge input (
PACK
) to "0". When the acknowledge input becomes "0", the PIO will
stop driving the input/output bus.
6) Repeat the operation from step 1).
5.3 Bus Control Mode
In bus control mode data input/output is controlled externally by the chip select input (
PCS
), flag/
buffer select input (PIOA), read input (
PACK
), and write input (
PSTB
).
(A) SCP operation
1) Write "00" to the PCMD (Command Register) PMOD bits. Also write "1" to PCMD’s PIEN bit to
enable input operation.
2) When an external device writes data to the input buffer PIB, the PSTS (Status Register) PIST bit
will become "1", indicating that there is valid data in the input buffer PIB.
3) If PCMD’s PIIE bit is "1", then a PIO interrupt to the CPU core will be generated.
4) The CPU core verifies that PSTS’s PIST bit is "1" in the PIO interrupt vector process routine and
reads the input buffer PIB. It then writes "0" to PSTS’s PIST bit to release the interrupt.
5) Repeat the operation from step 2).
(B) External operation
1) Read the input buffer full output (PIBF).
Chip select input
Flag/buffer select input PIOA
Read input
Write input
PCS
0
0
0
1
PACK
PSTB
2) Verify that the input buffer full output (PIBF) is "0".
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