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參數資料
| 型號： | w681511 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | Codec |
| 英文描述： | SINGLE-CHANNEL VOICEBAND CODEC |
| 中文描述： | 單通道聲帶編解碼器 |
| 文件頁數： | 11/34頁 |
| 文件大小： | 406K |
| 代理商： | W681511 |
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W681511
Publication Release Date: December 4, 2002
- 11 -
Revision A9
PCMT will become low impedance when the Frame Sync signal FST is high or when the 8 bit data
word is being transmitted. The transmit data pin PCMT will become high impedance when the Frame
Sync signal FST becomes low while the data is transmitted or when half of the LSB is transmitted. The
internal decision logic will determine whether the next frame sync is a long or a short frame sync,
based on the previous frame sync pulse. To avoid bus collisions, the PCMT pin will be high
impedance for two frame sync cycles after every power down state. More detailed timing information
can be found in the interface timing section.
7.4.2. Short Frame Sync
The W681511 operates in the Short Frame Sync Mode when the Frame Sync signal at pin FST is high
for one and only one falling edge of the bit-clock at the BCLKT pin. On the following rising edge of the
bit-clock, the W681511 starts clocking out the data on the PCMT pin, which will also change from high
to low impedance state. The data transmit pin PCMT will go back to the high impedance state halfway
the LSB. The Short Frame Sync operation of the W681511 is based on an 8-bit data word. When
receiving data on the PCMR pin, the data is clocked in on the first falling edge after the falling edge
that coincides with the Frame Sync signal. The internal decision logic will determine whether the next
frame sync is a long or a short frame sync, based on the previous frame sync pulse. To avoid bus
collisions, the PCMT pin will be high impedance for two frame sync cycles after every power down
state. More detailed timing information can be found in the interface timing section.
7.4.3. General Circuit Interface (GCI)
The GCI interface mode is selected when the BCLKR pin is connected to V
SS
for two or more frame
sync cycles. It can be used as a 2B+D timing interface in an ISDN application. The GCI interface
consists of 4 pins : FSC (FST), DCL (BCLKT), Dout (PCMT) & Din (PCMR). The FSR pin selects
channel B1 or B2 for transmit and receive. Data transitions occur on the positive edges of the data
clock DCL. The Frame Sync positive edge is aligned with the positive edge of the data clock DCLK.
The data rate is running half the speed of the bit-clock. The channels B1 and B2 are transmitted
consecutively. Therefore, channel B1 is transmitted on the first 16 clock cycles of DCL and B2 is
transmitted on the second 16 clock cycles of DCL. For more timing information, see the timing section.
相關PDF資料 |
PDF描述 |
|---|---|
| W681512 | SINGLE-CHANNEL VOICEBAND CODEC |
| W681512R | SINGLE-CHANNEL VOICEBAND CODEC |
| W681512RG | SINGLE-CHANNEL VOICEBAND CODEC |
| W681512S | SINGLE-CHANNEL VOICEBAND CODEC |
| W681512SG | SINGLE-CHANNEL VOICEBAND CODEC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W681511_05 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:SINGLE-CHANNEL VOICEBAND CODEC |
| W681511DK | 功能描述:KIT DEVELOPMENT FOR W681511 RoHS:否 類別:編程器，開發系統 >> 評估演示板和套件 系列:- 標準包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
| W681511IS | 制造商:WINBOND 制造商全稱:Winbond 功能描述:SINGLE-CHANNEL VOICEBAND CODEC |
| W681511S | 功能描述:IC VOICEBAND CODEC 5V 1CH 20SOP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數據接口:串行 分辨率（位）:18 b ADC / DAC 數量:2 / 2 三角積分調變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應商設備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| W681511SG | 功能描述:IC VOICEBAND CODEC 5V 1CH 20SOP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數據接口:串行 分辨率（位）:18 b ADC / DAC 數量:2 / 2 三角積分調變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應商設備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
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