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參數(shù)資料
| 型號(hào)： | MSM7708-02 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 元件分類(lèi)： | 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(cè)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(yè)數(shù)： | 35/38頁(yè) |
| 文件大小： | 232K |
| 代理商： | MSM7708-02 |
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Semiconductor
MSM7708-02
35/38
Playback Method (See the flow chart in Figure 10.)
(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 channel. (CR13 - B7 to
B3)
Set the ADRD (address read)
instruction. (CR13 - B1 = "1", B0
= "0")
(3) For playback of the voice ROM,
set the start/stop address here.
(4) The start/stop address of the
channel set by the ADRD
instruction is fetched from the
channel index area.
When status register BUSY (CR7
- B1) changes from "1" to "0",
fetching is complete.
(5) Start playback by setting the
PLAY (playback) command
(CR5 - B1 = "0", B0 = "1"). In this
case, basic setting of CR5 - B7 to
B5 should be the same as (1).
(6) Check the playback start with
the status register RPM bit (CR7
- B0 = "1").
(7) To stop playback set the STOP
(stop) command (CR5 - B1 = "1",
B0 = "1").
(8) When the address counter
reaches the stop address,
playback is complete.
Check completion of playback
with RPM bit = "0".
Note:
If the stop address value is
smaller than the start address
value, playback is made to the
last address of the serial
register.
Playback
BUSY = 0
RPM = 0
N
Basic setting
Y
(1) CR5
Channel setting
(ADRD)
(2) CR13
BUSY = 0
N
(4) CR7
PLAY
(5) CR5
Playback start
RPM = 1
N
(6) CR7
Playback start
check
STOP
Y
Y
RPM = 1
N
(8) CR7
Playback completion
check
Y
END
(7) CR5
Playback stop
ST, SP
address setting
(3) CR8 to 12
Voice ROM
Figure 10 Flow Chart of Playback
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