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參數(shù)資料
| 型號： | MSM7575 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 元件分類： | Codec |
| 英文描述： | Multi-Function ADPCM CODEC(多功能ADPCM(自適應差分脈沖編碼調(diào)制）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（自適應差分脈沖編碼調(diào)制）編碼譯碼器） |
| 文件頁數(shù)： | 20/25頁 |
| 文件大?。?/td> | 187K |
| 代理商： | MSM7575 |
20/25
Semiconductor
MSM7575
This programmable gain table should be assigned, not only for transmit/receive voice signal, but
also for the transmitted DTMF and other tones. The transmission of these tone signals are
enabled, by the CR4-B6 data described later, The original (reference) signal amplitude of these
tones are analogically defined as follows.
DTMF low-group-tones.................................... –16 dBm0/Tone
DTMF high-group-tones and others............... –14 dBm0/Tone
For example, when selecting +8 dB (B6, B5, B4) = (1,1,1) as a transmit gain, each tone signal
amplitude with 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 of side tone (path to receive side from transmit side) and 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 Transmit/Receive Gain Setting table
TX ON/OFF
0
Initial Value
CR2
TX GAIN2 TX GAIN1 TX GAIN0 RX ON/OFF RX GAIN2 RX GAIN1 RX GAIN0
0
1
1
0
0
1
1
B7
B6
B5
B4
B3
B2
B1
B0
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 |
|---|---|
| MSM7576 | LSI |
| MSM7577 | Voice Signal Level Control LSI |
| MSM7580 | ITU-T G.721 ADPCM TRANSCODER |
| MSM7581 | ITU-T G.721 4ch ADPCM TRANSCODER |
| MSM7582 | pie/4 Shift QPSK MODEM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM7576 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:LSI |
| MSM7577 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Voice Signal Level Control LSI |
| MSM7578 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Single Rail CODEC |
| MSM7578H | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Single Rail CODEC |
| MSM7578HG3-K | 制造商:ROHM Semiconductor 功能描述: |
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