Document
(l)UMC
,===========Dual UM2681 SERIES
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Features
• Dual full-duplex asynchronous receiver/transmitter • Ouadruple 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 transmiter' selectable from: 18 fixed rates: 50 to 38.4K baud 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 Localloopback 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 • Multi-function 8-bit output port
Individual bit set/reset capa.