TL16C550CPT

The TL16C550C and the TL16C550CI are
functional upgrades of the TL16C550B asynchronous
communications element (ACE), which in turn is a
functional upgrade of the TL16C450. Functionally
equivalent to the TL16C450 on power up (character
or TL16C450 mode), the TL16C550C and the
TL16C550CI, like the TL16C550B, can be placed
in an alternate FIFO mode. This relieves the
CPU of excessive software overhead by buffering
received and transmitted characters. The receiver
and transmitter FIFOs store up to 16 bytes including
three additional bits of error status per byte for the
receiver FIFO. In the FIFO mode, there is a selectable
autoflow control feature that can significantly reduce
software overload and increase system efficiency by
automatically controlling serial data flow using RTS
output and CTS input signals