The TL16C450FN is an Universal Asynchronous Receiver/Transmitter (UART) without FIFO. It is CMOS version of an asynchronous communications element (ACE). It typically functions in a microcomputer system as a serial input/output interface. It performs serial-to-parallel conversion on data received from a peripheral device or modem and parallel-to-serial conversion on data received from its CPU. The CPU can read and report on the status of the ACE at any point in the ACE's operation. Reported status information includes the type of transfer operation in progress, the status of the operation and any error conditions encountered. It includes a programmable, on-board, baud rate generator. This generator is capable of dividing a reference clock input by divisors from 1 to (21? -1) and producing a 16x clock for driving the internal transmitter logic. Provisions are included to use this 16x clock to drive the receiver logic.
Full double buffering eliminates the need for precise synchronization
Independent Receiver Clock Input
Transmit, receive, line status and data set interrupts independently controlled
Even, odd or no-parity bit generation and detection
False start bit detection
Complete status reporting capabilities
3-state TTL drive capabilities for bidirectional data bus and control bus
Line break detection and generation
Loopback controls for communications link fault isolation
Break, parity, overrun and framing-error simulation
Fully prioritized interrupt system controls
Modem control functions (CTS\, RTS\, DSR\, DTR\, RI\ and DCD\)
Easily interfaces to most popular microprocessors
Faster plug-in replacement for national semiconductor NS16C450
(EN)
