参数资料
型号: MC44C401EVK
厂商: Freescale Semiconductor
文件页数: 12/12页
文件大小: 0K
描述: KIT EVAL MC44C401 MTS ENCODER
标准包装: 1
主要目的: 音频,音频处理
已用 IC / 零件: MC44C401
相关产品: MC44C401LACR2-ND - IC STEREO ENCODER MTS 32-LQFP
MC44C401LAC-ND - IC STEREO ENCODER MTS 32-LQFP
MTS Stereo Encoder, Rev. 0.5
Freescale Semiconductor
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
9
Functional Description
7
Functional Description
The following sections provide brief descriptions of the MC44C401L modules.
7.1 Phase Locked Loop (APLL)
The APLL, shown in Figure 5, locks to the reference frequency of 12 MHz and generates the master clock.
Figure 5. APLL and Clock Generator
7.2 Sync Separator
The Sync Separator, shown in Figure 6, extracts the composite sync from the incoming composite video signal.
The composite sync is used by the Audio Processor to generate the 15.734 kHz pilot tone and the 31.468 kHz carrier
to modulate the Left-Right channel. The nominal output level of composite video signal sources is 1 Vpp on 75
and the sync amplitude is 0.3 V.
Figure 6. Sync Separator
Clock
Generator
APLL
MC44C401L
384 MHz
Oscillator
12MHz
Ref Clk
2M
÷
VCO
XTALOUT
XTALIN
22pF
Audio
Processor
Sync
Separator
MC44C401L
1M
470pF
0.1F
CVBS IN
1K
CVBS
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MC44C401FA 制造商:Freescale Semiconductor 功能描述:STEREO ENCODER - Trays
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