參數(shù)資料
型號: L64007
廠商: LSI CORP
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP160
封裝: PLASTIC, QFP-160
文件頁數(shù): 46/166頁
文件大?。?/td> 1015K
代理商: L64007
Arch
6 Wed May 28 17:36:23 1997
Draft 1/21/97
2-6
Architecture
PRE.4 for Rev. D
Copyright 1997 by LSI Logic Corporation. All rights reserved.
2.2
Clock Recovery
Unit (CRU)
The CRU in the L64007 transport demultiplexer locks the frequency of
the Local Master Clock (LMC), driven by an external VCxO, to the pro-
gram time base (see Figure 2.5). The program time base is transmitted
to the L64007 by a 42-bit Program Clock Reference (PCR) value. This
value is encoded in the adaptation eld of certain transport packets in
intervals
≤100 ms; the value represents the clock count of the source
program clock reference. Each program in the multiplexed transport bit
stream carries its own time base reference in the form of PCR data.
Figure 2.5
L64007 Architecture
Block Diagram
Channel
Start
OUT_SYNC
SYNC_ON
SYNC_OFF
bit stream
1
2
3
0
77
45
50
188 bytes
47
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