ST92196A STMicroelectronics, ST92196A Datasheet - Page 10

• Manufacturer Part Number: ST92196A
• Description: 8/16-bit Mcu For Tv Applications With Up To 96k Rom, On-screen-display And 1 Or 2 Data Slicers
• Manufacturer: STMicroelectronics

INTRODUCTION (Cont’d)
1.1.4 On-chip Peripherals
OSD Controller
The On Screen Display displays closed caption or
extended service format data received from the
on-chip data slicers or any text or menu data gen-
erated by the application. Rows of up to 63 charac-
ters can be displayed with two user-definable
fonts. Colors, character shape and other attributes
are software programmable. Support is provided
for mouse or other pointing devices.
Parallel I/O Ports
The ST9 is provided with dedicated lines for input/
output. These lines, grouped into 8-bit ports, can
be independently programmed to provide parallel
input/output or to carry input/output signals to or
from the on-chip peripherals and core e.g. SCI and
Multifunction Timer. All ports have active pull-ups
and pull-down resistors compatible with TTL
loads. In addition pull-ups can be turned off for
open drain operation and weak pull-ups can be
turned on to save chip resistive pull-ups. Input
buffers can be either TTL or CMOS compatible.
Multifunction Timer
The multifunction timer has a 16-bit Up/Down
counter supported by two 16-bit Compare regis-
ters and two 16-bit input capture registers. Timing
resolution can be programmed using an 8-bit pres-
caler.
Serial Communications Controller
The SCI provides an asynchronous serial I/O port
using two DMA channels. Baud rates and data for-
mats are programmable. Controller applications
can further benefit from the self test and address
wake-up facility offered by the character search
mode.
I
The I
necting multiple devices using a data line and a
clock line. Multimaster and slave modes are sup-
ported. Up to four channels are supported. The I
interface supports 7-bit addressing. It operates in
multimaster or slave mode and supports speeds of
up to 666.67 kHz. Bus events (Bus busy, slave ad-
dress recognised) and error conditions are auto-
matically flagged in peripheral registers and inter-
rupts are optionally generated.
Analog/Digital Converter
The ADC provides up to 8 analog inputs with on-
chip sample and hold. Conversion can be trig-
gered by a signal from the MFT.
2
C Bus Interface
2
C bus is a synchronous serial bus for con-
GENERAL DESCRIPTION
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2
C