SCN2681AC1A44
Dual asynchronous receiver/transmitter DUART
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
100k? 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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