ST92196A STMicroelectronics, ST92196A Datasheet - Page 192

• 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

8.11 SERIAL COMMUNICATIONS INTERFACE (SCI)
8.11.1 Introduction
The Serial Communications Interface (SCI) offers
full-duplex asynchronous serial data exchange for
interfacing a wide range of external equipment. It
has the following principal features:
Figure 82. SCI Block Diagram
– 5, 6, 7, or 8 bit word length.
– Even, odd, or no parity generation and detec-
Full duplex asynchronous operation.
Transmit, receive, line status, and device
address interrupt generation.
Integral Baud Rate Generator capable of
dividing the input clock by any value from 2 to
2
16X data sampling clock for asynchronous
operation.
Fully programmable serial interface:
16
-1 (16 bit word) and generating the internal
SOUT
TRANSMIT
REGISTER
TRANSMIT
REGISTER
BUFFER
SHIFT
CONTROLLER
DMA
ST9 CORE BUS
- SERIAL COMMUNICATIONS INTERFACE (SCI)
Frame Control
COMPARE
ADDRESS
REGISTER
and STATUS
CLOCK and
GENERATOR
BAUD RATE
CONTROLLER
– 0, 1, 1-1/2, 2, 2-1/2, 3 stop bit generation.
– Complete status reporting capabilities.
– Line break generation and detection.
Programmable address indication bit (wake-up
bit) and user invisible compare logic to support
multiple microcomputer networking. Optional
character search function.
Internal diagnostic capabilities:
– Local loopback for communications link fault
– Auto-echo for communications link fault isola-
Separate interrupt/DMA channels for transmit
and receive.
tion.
isolation.
tion.
DMA
RECEIVER
REGISTER
RECEIVER
REGISTER
BUFFER
SHIFT
SIN
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