SCN2681 - Philips

SCN2681 Dual asynchronous receiver/transmitter DUART

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. The operating m.

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
• 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 oscillat.