ST92195D datasheet(9/249 Pages) STMICROELECTRONICS

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ST92195C/D - 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 I²C 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 ST92195C and ST92195D have one or two

Standard Timer(s) that include a programmable

16-bit down counter and an associated 8-bit pres-

caler with Single and Continuous counting modes.

1.1.12 I²C Bus Interface

The ST92195D versions have one I²C bus inter-

face. The I²C bus is a synchronous serial bus for

connecting multiple devices using a data line and

a clock line. Multimaster and slave modes are sup-

ported. Up to two channels are supported. The I²C

interface supports 7-bit addressing. It supports

speeds of up to 800 KHz. Bus events (Bus busy,

slave address recognised) and error conditions

are automatically flagged in peripheral registers

and interrupts are optionally generated.

1.1.13 Analog/Digital Converter (ADC)

In addition there is a 4-channel Analog to Digital

Converter with integral sample and hold, fast

5.75µs conversion time and 6-bit guaranteed reso-

lution.

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