參數(shù)資料
型號(hào)： 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(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)： 28/38頁(yè)
文件大?。?/td> 232K
代理商： MSM7708-02
Semiconductor
MSM7708-02
28/38
(6) CR5 (Serial Register Interface Control)
B7:..............Connection between register and ADPCM
0: with ADPCM receive side
B6:..............Voice ROM/Serial register selection
0: Serial Register
B5:..............Connecting serial register capacity
0: 1 Mb (MSM63V89C)
1: 4 Mb (MSM6684), 8 Mb (MSM6685)
B4 - B2:......Reserved for test. Should be set "0"
B1, B0: .......Serial register I/F Instruction command
(CMD1, CMD0) =
1: ADPCM Transmit side
1: Voice ROM
(0, 0) :
(0, 1) :
(1, 0) :
(1, 1) :
NOP
PLAY (Playback)
REC (Recording)
STOP (Stop)
* (CMD1, CMD0) are reset (0, 0) after command execution.
Instruction commands of Play and REC should not be set when busy (CR5 - B1) and
RPM (CR5 - B0) are "1".
(7) CR6 (VOICE/SILENCE Detect Function Control)
B7:..............Voice/Silence detect function ON/OFF
B6, B5: .......Transmit side voice/silence detector level settings
(0,0): –20 dBm0
(1,0): –30 dBm0
B4:..............Hangover time (refer to Fig. 1) settings
B3:..............Receive side Voice/Silence detect input signal
0: Internal background noise transmit
When using this data, set the VOXI pin to "0".
B2:..............Receive side background noise level setting
0: Internal automatic setting
Internal automatic setting
Set to the voice signal level when B3 (VOXI)
changes from "1" to "0".
B1, B0: .......External setting background noise level
(0,0): No noise
(0,1): –55 dBm0
(1,0): –45 dBm0
(1,1): –35 dBm0
0: OFF 1: ON
(0,1): –25 dBm0
(1,1): –35 dBm0
0: 160 ms 1: 320 ms
1: Voice receive signal transmit
1: External (by B1, B0) setting
CR5
Initial value
SEND/
REC
0
B7
ROM/
SR
0
B6
4M8M/
1M
0
B5
—
0
B4
—
0
B3
—
0
B2
CMD1
0
B1
CMD0
0
B0
CR6
Initial value
VOX
ON/OFF
0
B7
ON
LVL1
0
B6
ON
LVL0
0
B5
OFF
TIME
0
B4
VOX
IN
0
B3
RX NOISE
LEVEL SEL
0
B2
RX NOISE
LVL1
0
B1
RX NOISE
LVL0
0
B0
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