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參數(shù)資料
| 型號： | MSM7708-02 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 元件分類： | Codec |
| 英文描述： | Serial Register Interface ADPCM CODEC for Telephone Recording(用于電話記錄的串行寄存器接口ADPCM編碼譯碼器) |
| 中文描述： | 串行接口差分PcM注冊解碼器的電話錄音（用于電話記錄的串行寄存器接口差分PcM編碼譯碼器） |
| 文件頁數(shù)： | 34/38頁 |
| 文件大小： | 232K |
| 代理商： | MSM7708-02 |
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Semiconductor
MSM7708-02
34/38
METHODS OF RECORDING AND PLAYBACK
Recording Method (See the flow chart in Figure 9.)
(1) Set up the connection between the serial register/
voice ROM and ADPCM transmit-receive
system. (See Figure 11.) (CR5 - B7)
Specify the serial register/voice ROM. (CR5 -
B6)
Set the external capacity. (CR5 - B5)
Set the NOP command. (CR5 - B1 = "0", B0 = "0")
(2) Set the start/stop address. (CR8 to CR12)
(3) Set the channel. (CR13 - B7 to B3)
Set the ADWT (address write) instruction. (CR13
- B1 = "0", B0 = "1")
(4) The start/stop address of the channel set by the
ADWT instruction is stored in the channel index
area. When status register BUSY (CR7 - B1)
changes from "1" to "0", storage is complete.
(5) Start recording by setting the REC (recording)
command (CR5 - B1 = "1", B0 = "0"). In this case,
the basic setting of CR5 - B7 to B5 should be the
same as (1).
(6) Check the recording start with the status register
RPM bit (CR7 - B0 = "1").
(7) To interrupt during recording, set the STOP
(stop) command (CR5 - B1 = "1", B0 = "1").
In this case, to store the address counter contents
in the channel index area as a new stop address,
the following settings are required:
Set the channel.
Set the ADWT instruction.
When the BUSY bit changes from "1"
to "0", settings are complete.
(8) When the address counter reaches the
stop address, recording is complete.
Check completion of recording with
RPM bit = "0".
Note: If the stop address value is smaller
than the start address value,
recording is made to the last address
of the serial register.
Recording
BUSY = 0
RPM = 0
N
Basic setting
Y
(1) CR5
ST, SP
address setting
(2) CR8 to CR12
Channel setting
(ADWT)
(3) CR13
BUSY = 0
N
(4) CR7
REC
(5) CR5
Recording start
RPM = 1
N
(6) CR7
Recording start
check
STOP
RPM = 0
N
Channel setting
(ADWT)
Y
Y
Y
BUSY = 0
N
RPM = 0
N
(8) CR7
Recording
completion
check
Y
Y
END
(7) CR5
Recording stop
CR13
CR7
Figure 9 Flow Chart of Recording
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