Description

The SCN2661BA1F28 is a universal synchronous/asynchronous data communications controller chip manufactured by Philips. This model is an enhanced version of its predecessor, SCN2651, and is capable of interfacing with all 8-bit and 16-bit microprocessors. The chip can be utilized in a polled or interrupt-driven system environment. It supports many serial data communications disciplines that include synchronous and asynchronous modes, both in the full or half-duplex option. The SCN2661BA1F28 model is designed to operate with baud rates up to 1Mbps with 1X clock.

Specifications and 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

Application Scenarios

The SCN2661BA1F28 chip is widely used in various applications, which includes:

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

Comparison

• The SCN2661BA1F28 is a universal synchronous/asynchronous data communications controller chip that can easily interface with all 8-bit and 16-bit microprocessors.
• The chip is an enhanced version of its predecessor, SCN2651, with additional features and capabilities.
• It supports many serial data communications disciplines that include synchronous and asynchronous modes, both in the full or half-duplex option.
• The chip is designed to operate with baud rates up to 1Mbps with 1X clock.
• It has a single +5V power supply and no system clock is required.

• The chip may not be suitable for systems requiring high baud rates beyond 1Mbps.
• The chip's functionality may be limited in certain custom applications.