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Signetics SCN68681C1N40

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£8.00

Product Info

SCN68681C1N40 Dual Asynchronous Receiver / Transmitter (DUART)


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Dual Asynchronous Receiver / Transmitter (DUART)

  • S68000 bus compatible
  • 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:
    • 18 fixed rates: 50 to 38.4 k baud
    • One user defined rate derived from programmable timer/counter
    • External 1× or 16× 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 6-bit input port
    • Can serve as clock or control inputs
    • Change of state detection on four inputs
  • 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
    • Interrupt vector output on interrupt acknowledge
    • Output port can be configured to provide a total of up to six separate wire-OR'able interrupt outputs
  • Maximum data transfer: 1× - 1MB/sec, 16× - 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
  • TTL compatible
  • Single + 5 V power supply

(Data taken from 1986 Signetic Microprocessor Data Manual. Page 2-547)

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