DESCRIPTION

The Philips Semiconductors SCN2651 PCI is a universal synchronous/asynchronous data communications controller chip designed for microcomputer systems. It interfaces directly to the Philips Semiconductors SCN2650 microprocessor and may be used in a polled or interrupt driven system environment. The SCN2651 accepts programmed instructions from the microprocessor and supports many serial data communication disciplines, synchronous and asynchronous, in the full or half-duplex mode.

FEATURES

• Synchronous operation

– 5- to 8-bit characters

– Single or double SYN operation

– Internal character synchronization

– Transparent or non-transparent mode

– Automatic SYN or DLE-SYN insertion

– SYN or DLE stripping

– Odd, even, or no parity

– Local or remote maintenance loopback mode

– Baud rate: DC to 1Mbps (1X clock)

• Asynchronous operation

– 5- to 8-bit characters

– 1, 1-1/2 or 2 stop bits

– Odd, even, or no parity

– Parity, overrun and framing error detection

– Line break detection and generation

– False start bit detection

– Automatic serial echo mode

– Local or remote maintenance loopback mode

– Baud rate: DC to 1Mbps

(1X clock)

DC to 62.5kbps (16X clock)

DC to 15.625kbps

(64X clock)

OTHER FEATURES

• Internal or external baud rate clock

• 16 internal rates – 50 to 19,200 baud

• Double buffered transmitter and receiver

• Full or half duplex operation

• TTL compatible inputs and outputs

• Single 5V power supply

• No system clock required

• 28-pin dual in-line package

APPLICATIONS

• Intelligent terminals

• Network processors

• Front-end processors

• Remote data concentrators

• Computer to computer links

• Serial peripherals