参数资料
型号: L64007
厂商: LSI CORP
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP160
封装: PLASTIC, QFP-160
文件页数: 135/166页
文件大小: 1015K
代理商: L64007
Arch
62 Wed May 28 17:36:23 1997
Draft 1/21/97
2-62
Architecture
PRE.4 for Rev. D
Copyright 1997 by LSI Logic Corporation. All rights reserved.
The frequency of the audio clock is internally controlled by the L64007
to support systems requiring output sampling rates of 32 kHz, 44.1 kHz,
or 48 kHz. The actual audio clock frequency is selectable to be 256 or
384 times the sample clock rate required by the audio D/A converter.
This requires the L64007’s FSC to generate the ACLK to be adjustable
between 8.192 MHz and 18.432 MHz. Figure 2.57 illustrates the archi-
tecture of the audio clock generation circuitry.
Figure 2.57
Audio Clock Generator
High-speed
Clock
Recovery Unit
High-speed
Interface
Channel
Data Input
Channel
Interface
PID
Processor
Video
Channel
Transport
FIFO
DRAM Control
MMU
Host Processor
Interface
External
DRAM Memory
Host
Processor
VCxO Clock
VCxO Control
Audio Clock
Decoder
A/V
AUX Port
Channel
FIFO
Decoder
Output Control Unit
(PPU)
8
Audio
Channel
Transport
FIFO
16
8/16
Audio
Clock
Generator
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