- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378017 > MSM7557 (OKI SEMICONDUCTOR CO., LTD.) Single Chip MSK Modem with Compandor for Cordless Telephone PDF資料下載
參數(shù)資料
| 型號(hào)： | MSM7557 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Single Chip MSK Modem with Compandor for Cordless Telephone |
| 中文描述： | 單芯片MSK調(diào)制解調(diào)器無繩電話與Compandor |
| 文件頁數(shù)： | 18/25頁 |
| 文件大小： | 153K |
| 代理商： | MSM7557 |
18/25
MSM7557
Semiconductor
Frame detection pattern is defined by BIT and FPS.
Fig 3 shows detection timing
First, put digital "0" level to FDE pin more than 1 ms, then FD pin is reset to "0" level.
Next, put digital "1" level to FDE pin, then RT and RD output digital "1" level until frame synchronous
signal detected.
When synchronous pattern is detected, FD pin is held to digital "1" level.
At the full power down state (PDN = "1", RVE = "0"), FD pin becomes reset state.
In order to detect frame synchronous signal certainly, receive side PLL should be locked in
sufficiently.
When a modem starts data transmittion, the bit-synchronous signal of more than 18 bits should be
transmitted before frame pattern of the upper table.
Frame Detector
Frame detection signal
FDE
Internal RD
Full power down signal
(Internal signal)
D
Q
Q
CK
FD
RT
RD
D
Q
Q
CK
Internal RT
BIT
0
0
1
1
FPS
0
1
0
1
Sync-pattern
9336H
C4D6H
A9336H
AC4D6H
Note
M.T. = Master telephone
S.H. = Slave handset
Receiver
S.H.
M.T.
S.H.
M.T.
Frame synchronous
Frame synchronous
Bit + Frame synchronous
Bit + Frame synchronous
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MSM7564-01 | CONNECTOR ACCESSORY |
| MSM7570-01 | Multi-Function ADPCM CODEC(多功能ADPCM編碼譯碼器) |
| MSM7575 | 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) |
| MSM7576 | LSI |
| MSM7577 | Voice Signal Level Control LSI |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM7560 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Single Rail ADPCM CODEC |
| MSM7560L | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Single Rail ADPCM CODEC |
| MSM7564-01 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:A Single Chip 14.4 kbps Data & Fax Modem |
| MSM7566 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Single Rail CODEC |
| MSM7566GS-K | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Single Rail CODEC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。