參數(shù)資料
型號(hào): TC90A92AFG
元件分類(lèi): 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁(yè)數(shù): 30/34頁(yè)
文件大?。?/td> 459K
代理商: TC90A92AFG
TC90A92AFG
4.1 Introduction
TC90A92AFG is a signal processor for normal scan (525i, 625i) signal.
1. TC90A92AFG has input interface for CVBS, S and component video signals.
2. TC90A92AFG has a 3D YCS function for M-NTSC signal with internal 4Mbit DRAM.
And in case of 3line YCS mode it is available to use 3D YNR & CNR function.
3. TC90A92AFG has a 3D YNR & CNR for S terminal input and 1H component signal.
4. TC90A92AFG has a digital input interface for Ghost reduction LSI.
5. TC90A92AGF has color decoder circuit for multi video system and cync separation circuit.
6. Selectable automatic color system detection mode and forced color system mode.
7. TC90A92AFG has picture quality improve function.
8. TC90A92AFG has ITUR-656 and 601 output interface.
9. TC90A92AFG has S/N detection, ID-1 data slice and CCD data slice function for M-NTSC and
it is available to read via IIC read mode.
4.2 Function
(1) Input stage
The input video signal (CVBS/S / YCbCr) is converted to digital video signal by internal A/D converter
of TC90A92AFG. TC90A92AFG generates the fH synchronous clock (27MHz) from the digital video signal by
using
PLL circuit, H sync separation circuit and H sync regeneration circuit.
This clock is generated by internal digital VCO circuit which has 42MHz X’tal oscillation circuit as a reference
clock.
(2) Input interface
a) Setting for input mode
Input signal can be set via INSEL at sub address 00 hex.
INSEL : 00: CVBS 01: S input 10: YCbCr 11: GR digital input
b) Dynamic range of the internal ADC
TC90A92AFG has a 10bit ADC for analog CVBS, Y signal of S input and Y signal of component.
For color signal (chroma & CbCr), TC90A92AFG has a another 8bit ADC.
Dynamic range of the internal ADC is designed by AVDD~0.4(Reference level : 1Vp-p).
Recommend amplitude of analog video signal input is 0.7Vp-p (140IRE).
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