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Product Details

SCN2681AC1N28 Product details

DESCRIPTION

The Philips Semiconductors SCN2681 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 interfaces directly with microprocessors and may be used in a polled or interrupt driven system.

FEATURES

• Dual full-duplex asynchronous receiver/transmitter

• Quadruple buffered receiver data registers

• Programmable data format

    – 5 to 8 data bits plus parity

    – Odd, even, no parity or force parity

    – 1, 1.5 or 2 stop bits programmable in 1/16-bit increments

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

    – 22 fixed rates: 50 to 115.2k baud

• 16-bit programmable Counter/Timer

    – Non-standard rates to 115.2Kb

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

    – External 1X or 16X clock

• Parity, framing, and overrun error detection

• False start bit detection

• Line break detection and generation

• Programmable channel mode

    – Normal (full-duplex)

    – Automatic echo

    – Local loopback

    – Remote loopback

• Multi-function programmable 16-bit counter/timer

• Multi-function 7-bit input port

    – Can serve as clock or control inputs

    – Change of state detection on four inputs

    – 100kΩ typical pull-up resistor

• Multi-function 8-bit output port

    – Individual bit set/reset capability

    – Outputs can be programmed to be status/interrupt signals

• Versatile interrupt system

    – Single interrupt output with eight maskable interrupting conditions

    – Output port can be configured to provide a total of up to six separate wire-ORable interrupt outputs

• Maximum data transfer: 1X – 1MB/sec, 16X – 125kB/sec

• Automatic wake-up mode for multidrop applications

• Start-end break interrupt/status

• Detects break which originates in the middle of a character

• On-chip crystal oscillator

• Single +5V power supply

• Commercial and industrial temperature ranges available

• DIP and PLCC packages

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