![background image](http://html1.mh-extra.com/html/hyundai/hpt-4205/hpt-4205_service-manual_2197045035.webp)
33
Plasma TV Service Manual
14/03/2005
No occurrence of disturbance pulses at the output
Short settling time after power on (<200_s)
12.25. PCF8591
12.25.1. General Description
The PCF8591 is a single-chip, single-supply low power 8-bit CMOS data acquisition device with four
analog inputs, one analog output and a serial I
2
C-bus interface.
Three address pins A0, A1 and A2 are used for programming the hardware address, allowing the use of
up to eight devices connected to the I
2
C-bus without additional hardware. Address, control and data to
and from the device are transferred serially via the two-line bidirectional I
2
C-bus.
The functions of the device include analog input multiplexing, on-chip track and hold function, 8-bit
analog-to-digital conversion and an 8-bit digital-to-analog conversion. The maximum conversion rate is
given by the maximum speed of the I
2
C-bus.
12.25.2. Features
Single power supply
Operating supply voltage 2.5 V to 6 V
Low standby current
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
VSS
to
VDD
On-chip track and hold circuit
8-bit successive approximation A/D conversion
Multiplying DAC with one analog output.
12.25.3. 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
12.26. PW1231
12.26.1. 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.
Summary of Contents for HPT-4205
Page 1: ...42 PLASMA TV Built in Tuner SERVICE MANUAL...
Page 56: ...54 Plasma TV Service Manual 14 03 2005 15 CIRCUIT DIAGRAMS...
Page 57: ...55 Plasma TV Service Manual 14 03 2005...
Page 58: ...56 Plasma TV Service Manual 14 03 2005...
Page 59: ...57 Plasma TV Service Manual 14 03 2005...
Page 60: ...58 Plasma TV Service Manual 14 03 2005...
Page 61: ...59 Plasma TV Service Manual 14 03 2005...
Page 62: ...60 Plasma TV Service Manual 14 03 2005...
Page 63: ...61 Plasma TV Service Manual 14 03 2005...