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參數(shù)資料
| 型號： | GS9090A |
| 廠商： | Gennum Corporation |
| 英文描述： | GS9090A GenLINX-R III 270Mb/s Deserializer for SDI |
| 中文描述： | GS9090A GenLINX - R的第三270Mb / s的SDI解串器 |
| 文件頁數(shù)： | 25/69頁 |
| 文件大?。?/td> | 687K |
| 代理商： | GS9090A |
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GS9090A Preliminary Data Sheet
Proprietary and Confidential
34714 - 0
February 2006
25 of 69
Word alignment occurs when two consecutive valid TRS words (SAV and EAV
inclusive) with the same bit alignment have been detected (1 video line).
In normal operation, re-synchronization of the word alignment process will only
take place when two consecutive identical TRS word positions have been
detected. When automatic or manual switch line lock handling occurs (see
Switch
Line Lock Handling on page 25
), word alignment re-synchronization will occur on
the next received TRS code word.
The device will drop out of SMPTE mode, only after 6 consecutive missing TRS
timing words.
3.6.2 Internal Flywheel
The GS9090A has an internal flywheel for the generation of internal / external
timing signals, the detection and correction of certain error conditions, and the
automatic detection of video standards. The flywheel is only operational in SMPTE
mode.
The flywheel 'learns' the video standard by monitoring the horizontal and vertical
reference information contained in the TRS ID words of the received video stream.
Full synchronization of the flywheel to the received video standard therefore
requires one complete video frame.
Once synchronization has been achieved, the flywheel will continue to monitor the
received TRS timing information to maintain synchronization.
The FW_EN input pin controls the synchronization mechanism of the flywheel.
When this input signal is LOW, the flywheel will re-synchronize all pixel and line
based counters on every received TRS ID word.
When FW_EN is held HIGH, re-synchronization of the pixel and line based
counters will take place after 3 consecutive video lines with identical TRS timing
are identified. This provides a measure of noise immunity for output timing signal
generation.
The flywheel will be disabled should the LOCKED signal or RESET signal be LOW.
This will occur regardless of the setting of the FW_EN pin.
3.6.3 Switch Line Lock Handling
The principle of switch line lock handling is that the switching of synchronous video
sources will only disturb the horizontal timing and alignment of the stream, whereas
the vertical timing remains in synchronization.
To account for the horizontal disturbance caused by a synchronous switch, it is
necessary to re-synchronize the flywheel immediately after the switch has taken
place. Rapid re-synchronization of the GS9090A to the new video standard can be
achieved by controlling the flywheel using the FW_EN pin.
At every PCLK cycle the device samples the FW_EN pin. When the FW_EN pin is
set LOW anywhere within the active line, the flywheel will re-synchronize
immediately to the next TRS word.
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| GS9090A_10 | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:GenLINX III 270Mb/s Deserializer |
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| GS9090BCNE3 | 功能描述:RF, RFID, WIRELESS RoHS:是 類別:集成電路 (IC) >> 接口 - 串行器，解串行器 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 功能:解串器 數(shù)據(jù)速率:2.5Gbps 輸入類型:串行 輸出類型:并聯(lián) 輸入數(shù):- 輸出數(shù):24 電源電壓:1.8 V ~ 3.3 V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:64-TQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-TQFP-EP（10x10） 包裝:管件 |
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