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)： 25/38頁(yè)
文件大?。?/td> 232K
代理商： MSM7708-02
Semiconductor
MSM7708-02
25/38
(4) CR3 (Side Tone and Tone Generator Gain Adjustment)
B7, B6, B5:........ Side tone gain adjustment (refer to Table 3)
B4:..................... Tone generator ON/OFF 0: OFF 1: ON
B3, B2, B1, B0: . Tone generator
Table 3 Side Tone Gain Settings
Receive side gain adjustment (refer to Table 4)
B7
0
0
0
0
1
1
1
1
B6
0
0
1
1
0
0
1
1
B5
0
1
0
1
0
1
0
1
Side Tone Gain
OFF
–15 dB
–13 dB
–11 dB
– 9 dB
– 7 dB
– 5 dB
– 3 dB
Table 4 Receive Side Tone Generator Gain Settings
The receive side tone generator gain settings shown in Table 4 are set with the following levels
as a reference.
DTMF tones (low group):.................................–2 dBm0
DTMF tones (high group) and other tones:...0 dBm0
For example, if the tone generator gain set value is set to –6 dB (B3, B2, B1, B0)=(1, 1, 1, 1), then
tones at the following levels appear at the SAO or VFRO pin.
DTMF tones (low group):.................................–8 dBm0
DTMF tones (high group) and other tones:...–6 dBm0
CR3
Initial value
Side Tone
GAIN2
0
B7
Side Tone
GAIN1
0
B6
Side Tone
GAIN0
0
B5
TONE
ON/OFF
0
B4
TONE
GAIN3
0
B3
TONE
GAIN2
0
B2
TONE
GAIN1
0
B1
TONE
GAIN0
0
B0
B3
0
0
0
0
0
0
0
0
B2
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
B0
0
1
0
1
0
1
0
1
Tone Generator Gain
–36 dB
–34 dB
–32 dB
–30 dB
–28 dB
–26 dB
–24 dB
–22 dB
B3
1
1
1
1
1
1
1
1
B2
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
B0
0
1
0
1
0
1
0
1
Tone Generator Gain
–20 dB
–18 dB
–16 dB
–14 dB
–12 dB
–10 dB
– 8 dB
– 6 dB
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