- New low overhead interrupt control
- All commercial parts meet industrial timing and temperature parameters
- Four Philips Semiconductors industry-standard UARTs
- Eight byte receive FIFO and eight byte transmit FIFO for each UART
- 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
- Baud rate for the receiver and transmitter selectable from:
- 23 fixed rates: 50 to 230.4K baud Non-standard rates to 1.0M baud
- User-defined rates from the programmable counter/timer associated with each of two blocks
- 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 loop back, remote loopback - Programmable interrupt priorities
- Identification of highest priority interrupt
- Global interrupt register set provides data from interrupting channel
- Vectored interrupts with programmable vector format
- IACKN and programmable DTACKN signals
- Built-in baud rate generator with choice of 18 rates
- Four I/O pins per UART for modem controls, clocks, etc.
- Power down mode
- High-speed CMOS technology
- 52-pin PLCC and 48-pin DIP
- Commercial and industrial temperature ranges available
- On-chip crystal oscillator
- TTL compatible
- Single +5V power supply with low power mode
- Two multifunction programmable 16-bit counter/timers
- 1MHz 16x mode operation
- 10ns data bus release time
- 'Watch Dog' timer for each receiver
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