33
27” TFT TV Service Manual
05/09/2005
•
On-chip track and hold circuit
•
8-bit successive approximation A/D conversion
•
Multiplying DAC with one analog output.
12.23.3. Pinning
SYMBOL PIN
DESCRIPTION
AINO
1
analog inputs (A/D converter)
AIN1
2
AIN2
3
AIN3
4
A0
5
hardware address
A1
6
A2
7
V
SS
8
negative supply voltage
SDA
9
I
2
C-bus data input/output
SCL
10
I
2
C-bus clock input
OSC
11
oscillator input/output
EXT
12
external/internal switch for oscillator input
AGND
13
analog ground
V
REF
14
voltage reference input
AOUT
15
analog output (D/A converter)
V
DD
16
positive supply voltage
12.24.
PW1231
12.24.1. General Description
The PW1231 is a high-quality, digital video signal processor that incorporates Pixelworks’ patented
deinterlacing, scaling, and video enhancement algorithms. The PW1231 accepts industry-standard
video formats and resolutions, and converts the input into any desired output format. The video
algorithms are highly efficient, providing excellent quality video.
The PW1231 Video SignalProcessor combines many functions into a single device, including memory
controller, auto-configuration, and others. This high level of integration enables simple, flexible, cost-
effective solutions featuring fewer required components.
12.24.2. Features
• Built-In Memory Controller
• Motion-Adaptive Deinterlace Processor
• Intelligent Edge Deinterlacing
• Digital Color/Luminance Transient Improvement (DCTI/DLTI)
• Interlaced Video Input Options, including NTSC and PAL
• Independent horizontal and vertical scaling
• Copy Protection
• Two-Wire Serial Interface
12.24.3. Applications
For use with Digital Displays
• Flat-Panel (LCD, DLP) TVs
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