ST92195B datasheet(3/22 Pages) STMICROELECTRONICS

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ST92195B - GENERAL DESCRIPTION

INTRODUCTION (Cont’d)

1.1.7 Teletext, VPS and WSS Data Slicers

The three on-board data slicers using a single ex-

ternal crystal are used to extract the Teletext, VPS

and WSS information from the video signal. Hard-

ware Hamming decoding is provided.

1.1.8 Voltage Synthesis Tuning Control

14-bit Voltage Synthesis using the PWM (Pulse

Width Modulation)/BRM (Bit Rate Modulation)

technique can be used to generate tuning voltages

for TV set applications. The tuning voltage is out-

put on one of two separate output pins.

1.1.9 PWM Output

Control of TV settings can be made with up to

eight 8-bit PWM outputs, with a maximum frequen-

cy of 23,437Hz at 8-bit resolution (INTCLK = 12

MHz). Low resolutions with higher frequency oper-

ation can be programmed.

1.1.10 Serial Peripheral Interface (SPI)

The SPI bus is used to communicate with external

devices via the SPI, or I C bus communication

standards. The SPI uses a single data line for data

input and output. A second line is used for a syn-

chronous clock signal.

1.1.11 Standard Timer (STIM)

The ST92195B has one Standard Timer (STIM0)

that includes a programmable 16-bit down counter

and an associated 8-bit prescaler with Single and

Continuous counting modes.

1.1.12 Analog/Digital Converter (ADC)

In addition there is a 4-channel Analog to Digital

Converter with integral sample and hold, fast

5.75

µs conversion time and 6-bit guaranteed reso-

lution.

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