SCN2661BC1F28

DESCRIPTION

The Philips Semiconductors SCN2661 EPCI is a universal synchronous/asynchronous data communications controller chip that is an enhanced version of the SCN2651. It interfaces easily to all 8-bit and 16-bit microprocessors and may be used in a polled or interrupt driven system environment. The SCN2661 accepts programmed instructions from the microprocessor while supporting many serial data communications disciplines —synchronous and asynchronous — in the full- or half-duplex mode. Special support for BISYNC is provided.

FEATURES

• Synchronous operation
– 5- to 8-bit characters plus parity
– Single or double SYN operation
– Internal or external character synchronization
– Transparent or non-transparent mode
– Transparent mode DLE stuffing (Tx) and detection (Rx)
– Automatic SYN or DLE-SYN insertion SYN, DLE and DLESYN 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 plus parity
– 1, 1-1/2 or 2 stop bits transmitted
– Odd, even, or no parity
– Parity, overrun and framing error detection
– Line break detection and generation
– False start bit detection
– Automatic serial echo mode (echoplex)
– 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
• 3 baud rate sets
• 16 internal rates for each set
• Double-buffered transmitter and receiver
• Dynamic character length switching
• Full- or half-duplex operation
• TTL compatible inputs and outputs
• RxC and TxC pins are short-circuit protected
• Single +5V power supply
• No system clock required

APPLICATIONS

• Intelligent terminals
• Network processors
• Front-end processors
• Remote data concentrators
• Computer-to-computer links
• Serial peripherals
• BISYNC adaptors