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參數(shù)資料
| 型號(hào)： | 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(yīng)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(yīng)差分脈沖編碼調(diào)制）編碼譯碼器） |
| 文件頁數(shù)： | 24/25頁 |
| 文件大?。?/td> | 187K |
| 代理商： | MSM7575 |
24/25
Semiconductor
MSM7575
(7) CR6 (VOX function control)
B7 ... VOX function enable :
B6, B5 ... Transmit signal energy detect (Transmit VOX) threshold
(0, 0): –30 dBm0
(0, 1): –35 dBm0
(1, 0): –40 dBm0
(1, 1): –45 dBm0
B4 ... Hang-over time (Fig. 2, T
VXOFF)
:
B3 ... Receive VOX function setting :
When using this data for control, the pin VOXI should be set at a “L” level.
B2 ... Background noise amplitude setting :
Automatic : The noise is set at the voice signal amplitude at the time when B3
(or VOXI) changes from “1” to digital “0”.
B1, B0 ... (0, 0):
No noise
(0, 1):
–55 dBm0
(1, 0):
–45 dBm0
(1, 1):
–35 dBm0
0/Disable, 1/Enable
0/160 ms, 1/320 ms
0/Background noise transmit, 1/Voice signal detect
0/Automatic, 1/Programmable by B1 and B0
(8) CR7 (Detect register, read only)
*
For IC test
B7 ... Transmit VOX function result :
B6, B5 ... Transmit voiceless level (indicator) :
(0, 0) : below –60 dBm0
(0, 1) : –50 to –60 dBm0
(1, 0) : –40 to –50 dBm0
(1, 1) : over –40 dBm0
B4 ... Not used
B3 ... Not used
B2 ... Not used
B1 ... Not used
B0 ... Not used
0/Absence, 1/Presence
Note) These outputs are valid only when VOX
function is enabled by CR6-B7.
VOX
ON/OFF
0
Initial Value
CR6
ON
LVL1
0
ON
LVL0
0
OFF
TIME
0
VOX IN
RX NOISE
LEVEL SEL
0
RX NOISE
LVL1
0
RX NOISE
LVL0
0
0
B7
B6
B5
B4
B3
B2
B1
B0
VOX
OUT
0
Initial
CR7
TX NOISE
LVL1
0
TX NOISE
LVL0
0
—
—
—
—
—
*
*
*
*
*
B7
B6
B5
B4
B3
B2
B1
B0
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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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