參數(shù)資料
型號(hào)： MSM7570-01
廠商： OKI SEMICONDUCTOR CO., LTD.
元件分類： Codec
英文描述： Multi-Function ADPCM CODEC(多功能ADPCM編碼譯碼器)
中文描述： 多功能差分PcM編解碼器（多功能差分PcM編碼譯碼器）
文件頁(yè)數(shù)： 19/25頁(yè)
文件大?。?/td> 169K
代理商： MSM7570-01
19/25
Semiconductor
MSM7570-01
This programmable gain table should be assigned, not only for transmit/receive voice signal and
the transmitted DTMF and other tones. The transmission of these tone signals is enabled by the
CR4-B6 data described later. The original (reference) signal amplitude of these tones is analogi-
cally defined as follows.
DTMF low-group-tones.................................... –16 dBm0
DTMF high-group-tones and others............... –14 dBm0
For example, when selecting +8 dB (B6, B5, B4) = (1,1,1) as a transmit gain, each tone signal
amplitude with an analogical expression on the pin PCMSO becomes as follows .
DTMF low-group tones .................................... –8 dBm0
DTMF high-group tones and other tones ...... –6 dBm0
Gain setting for the side tone (path to receive side from transmit side) and the receive side tone
is performed by register CR3.
(3) CR2 (PCM CODEC operational mode setting and transmit/receive gain adjustment)
B7 ... PCM Coder disable;
B6, B5, B4 ... Transmit gain adjustment, refer to Table-2.
B3 ... PCM Decoder disable;
B2, B1, B0 ... Receive gain setting, refer to Table-2.
0/Enable, 1/Disable (transmit PCM idle pattern)
0/Enable, 1/Disable (receive PCM idle pattern)
Table-2
B0
RX GAIN0
1
B1
RX GAIN1
1
B2
RX GAIN2
0
B3
RX ON/OFF
0
B4
TX GAIN0
1
B5
TX GAIN1
1
B6
TX GAIN2
0
B7
TX ON/OFF
0
CR2
Initial Value
B6
0
0
0
0
1
1
1
1
B5
0
0
1
1
0
0
1
1
B4
0
1
0
1
0
1
0
1
Transmit Gain
–6 dB
–4 dB
–2 dB
0 dB
+2 dB
+4 dB
+6 dB
+8 dB
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
Receive Gain
–6 dB
–4 dB
–2 dB
0 dB
+2 dB
+4 dB
+6 dB
+8 dB
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MSM7570-01T3K 功能描述:電信集成電路 32 KBPS SINGLE CH ADPCM CODEC IC RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray
MSM7570-01TS-K 制造商:ROHM Semiconductor 功能描述:
MSM75701 制造商:OK International 功能描述:
MSM7570L-01 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Multi-Function ADPCM CODEC
MSM7570L-02 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Multi-Function ADPCM CODEC
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