DESCRIPTION
The Ei16C552 is an enhanced dual channel version of the Ei16C550 Universal Asynchronous Receiver Transmitter (UART). The device serves two serial input/output interfaces simultaneously in microcomputer or microprocessor based systems. Each channel performs a serial-to-parallel conversion on data characters received from peripheral devices or modems, and a parallel-to-serial conversion on data characters transmitted by the CPU. The complete status of each channel of the dual UART can be read at any time during functional operation by the CPU.The information obtained includes the type and condition of the transfer operations being performed, and error conditions.

FEATURES
• IBM PC AT™ and PS/2™ compatible
• Dual channel version of Ei16C550 with
   Centronics printer interface
• Independent control of transmit, receive, line
   status and data set interrupts on each channel
• Programmable serial interface characteristics for
   each channel:
   -5, 6, 7 or 8 bit characters
   -Even, odd or no parity bit generation and
   dectection
   -1, 1.5 or 2 stop bit generation
• Programmable baud rate generator divides
   CLK input by a divisor between 1 and (216 -1)
• Tri-State® TTL drive capability for bidirectional
   data bus and control bus on each channel
• 16 byte FIFO for receiver as well as for trans
   mitter.
• Advanced CMOS low power technology with
   single 5 volt supply