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SCN68681

Philips
Part Number SCN68681
Manufacturer Philips
Description Dual asynchronous receiver/transmitter DUART
Published Jul 4, 2005
Detailed Description INTEGRATED CIRCUITS SCN68681 Dual asynchronous receiver/transmitter (DUART) Product specification Supersedes data of 19...
Datasheet PDF File SCN68681 PDF File

SCN68681
SCN68681

Overview
INTEGRATED CIRCUITS SCN68681 Dual asynchronous receiver/transmitter (DUART) Product specification Supersedes data of 1995 May 01 IC19 Data Handbook 1998 Sep 04 Philips Semiconductors Philips Semiconductors Product specification Dual asynchronous receiver/transmitter (DUART) SCN68681 DESCRIPTION The Philips Semiconductors SCN68681 Dual Universal Asynchronous Receiver/Transmitter (DUART) is a single-chip MOS-LSI communications device that provides two independent full-duplex asynchronous receiver/transmitter channels in a single package.
It is compatible with other S68000 family devices, and can also interface easily with other microprocessors.
The DUART can be used in polled or interrupt driven systems.
The operating mode and data format of each channel can be programmed independently.
Additionally, each receiver and transmitter can select its operating speed as one of eighteen fixed baud rates, a 16X clock derived from a programmable counter/timer, or an external 1X or 16X clock.
The baud rate generator and counter/timer can operate directly from a crystal or from external clock inputs.
The ability to independently program the operating speed of the receiver and transmitter make the DUART particularly attractive for dual-speed channel applications such as clustered terminal systems.
Each receiver is quadruply buffered to minimize the potential of receiver overrun or to reduce interrupt overhead in interrupt driven systems.
In addition, a flow control capability is provided to disable a remote DUART transmitter when the buffer of the receiving device is full.
Also provided on the SCN68681 are a multipurpose 6-bit input port and a multipurpose 8-bit output port.
These can be used as general purpose I/O ports or can be assigned specific functions (such as clock inputs or status/interrupt outputs) under program control.
• 16-bit programmable Counter/Timer • Parity, framing, and overrun error detection • False start bit detection • Line break detection and genera...


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