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• Serial input/output via I 2 C-bus
• Address by 3 hardware address pins
• Sampling rate given by I 2 C-bus speed
• 4 analog inputs programmable as single-ended or differential inputs
• Auto-incremented channel selection
• Analog voltage range from
• On-chip track and hold circuit
• 8-bit successive approximation A/D conversion
• Multiplying DAC with one analog output.
9.19.3. Pinning
SYMBOL
PIN
AINO
1
AIN1
2
AIN2
3
AIN3
4
A0
5
A1
6
A2
7
V
8
SS
SDA
9
SCL
10
OSC
11
EXT
12
AGND
13
V
14
REF
AOUT
15
V
16
DD
9.20. PW1231
9.20.1. 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 Signal Processor 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.
9.20.2. Features
• Built-In Memory Controller
• Motion-Adaptive Deinterlace Processor
• Intelligent Edge Deinterlacing
• Digital Colour/Luminance Transient Improvement (DCTI/DLTI)
• Interlaced Video Input Options, including NTSC and PAL
• Independent horizontal and vertical scaling
Plasma TV Service Manual
to
VSS
VDD
DESCRIPTION
analog inputs (A/D converter)
hardware address
negative supply voltage
2
I
C-bus data input/output
2
I
C-bus clock input
oscillator input/output
external/internal switch for oscillator input
analog ground
voltage reference input
analog output (D/A converter)
positive supply voltage
27
11/01/2005
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