Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.
9.
Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Block Diagram
9.3 Abbreviation List
9.4 IC Data Sheets
Notes:
•
Only
new
circuits (circuits that are not published recently)
are described.
•
Figures can deviate slightly from the actual situation, due
to different set executions.
9.1
Introduction
This chassis supports PC analogue input up to WXGA
resolution, and supports TV (RF) for all China (/93) and AP (/
98) systems: PAL B/G, PAL D/K, PAL I, SECAM B/G, SECAM
D/K, NTSC M, YC, CVBS, YPbPr, HDMI and PC signal input
from SDTV to HDTV (480i/p, 576i/p, 720p, 1080i/p).
The platform is also designed for the lowest power
consumption in off/stand-by mode (<0.3W) to fulfil new Philips
CE environment policy requirement.
It uses two main ICs: MST98981CLD (One Chip LCD-TV
Controller) and WT6702F (Stand-by MCU). The MST98981 is
one chip LCD-TV controller which has embedded ADC for HD/
Analogue D-sub input, ITU656/601 digital port for digital data
input, SD ADC for CVBS/YC input, video decoder, audio
decoder, TXT decoder, Micro controller, OSD engine, and up/
down scaler.
For displaying, it will connect the LVDS signal interface to the
WXGA panel via an LVDS cable. The WT6702F is mainly for
TV stand-by remaining function during off/stand-by mode.
When the TV set enters to off/stand-by mode, the MST98981
will be totally shut down and remains only the WT6702F to
meet the lowest power consumption.
The MST98981 is a high performance and fully integrated IC
for multi-function LCD TV/Monitor with resolutions up to SXGA/
WXGA+1440x900. It is configured with an integrated triple
ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a multi-
standard TV video and audio decoder, a video de-interlacer, a
scaling engine, the MStarACE-3 colour engine, an on-screen
display controller, an 8-bit MCU, and a built-in output panel
interface. With an external frame buffer, 3D video decoding and
processing are fulfilled for high-quality TV applications. The
MST98981CLD also integrates intelligent power management
control capability for green-mode requirements and spread-
spectrum support for EMI management
The MST98981CLD embeds the 3D motion de-interlace to
generate smooth picture quality for motion. A 3D comb filter
also recovers high details for still pictures. The special colour
processing technology provides favourite and natural colours.
The WT6702F is a micro controller for system power
management with Turbo 8051 compatible (3T) CPU, flash
memory, SRDAM, 2 PWMs, DPMS detector, 2 timer and
UART, 3 slave IIC interface, 4 channel 8-bit A/D converter, real
time clock, watch-dog timer, embedded ISP, power down mode
and embedded ICE mode.
9.2
Block Diagram
Figure 9-1 Function diagram MST98980/1
I_17610_016.ep
s
2
8
0
3
0
8
