DESCRIPTION

The Philips Semiconductors SC26C562 Dual Universal Serial Communications Controller (CDUSCC) is a single-chip CMOS-LSI communications device that provides two independent, multi-protocol, full-duplex receiver/transmitter channels in a single package. It supports bit-oriented and character-oriented (byte count and byte control) synchronous data link controls as well as asynchronous protocols. The SC26C562 interfaces to synchronous bus MPUs and is capable of program-polled, interrupt driven, block-move or DMA data transfers.

FEATURES

General Features

• Dual full-duplex synchronous/ asynchronous receiver and transmitter

• Multi-protocol operation

– BOP: HDLC/ADCCP, SDLC, SDLC loop, X.25 or X.75 link level, etc.

– COP: Single SYNC, dual SYNC, BiSYNC, DDCMP

– ASYNC: 5-8 bits plus optional parity

• Sixteen character receive and transmit FIFOs with interrupt threshold control

• FIFO’ed status bits

• Watchdog timer

• 0 to 10 Mbit/sec data rate

• Programmable bit rate for each receiver and transmitter selectable from:

– 19 fixed rates: 50 to 64K baud

– One user-defined rate derived from programmable counter/timer

– External 1X or 16X clock

– Digital phase-locked loop

• Parity and FCS (frame check sequence LRC or CRC) generation and checking

• Programmable data encoding/decoding: NRZ, NRZI, FM0, FM1, Manchester

• Programmable channel mode: full- or half-duplex, auto-echo, or local loopback

• Programmable data transfer mode: polled, interrupt, DMA, wait

• DMA interface

– Compatible with Synchronous and Asynchronous bus DMA controllers

– Half- or full-duplex operation

– Single or dual address data transfers

– Automatic frame termination on counter/ timer terminal count or DMA DONE (EOPN)

• Transmit path clear status

• High speed data bus interface: 160ns bus cycle

• DPLL operation up to 312.5kHz with internal clock

• Interrupt capabilities

– Vector output (fixed or modified by status)

– Individual interrupt enable bits

– Programmable internal priorities

– Maskable interrupt conditions

– 80XX/X compatible

• Multi-function programmable 16-bit counter/timer

– Bit rate generator

– Event counter

– Count received or transmitted characters

– Delay generator

– Automatic bit length measurement

• Modem controls

– RTS, CTS, DCD, and up to four general purpose I/O pins per channel

– CTS and DCD programmable auto-enables for Tx and Rx

– Programmable interrupt on change of CTS or DCD

• On-chip oscillator for crystal

• TTL compatible

• Single +5V power supply