The SC16C2550BIA44 is a 2-channel Universal Asynchronous Receiver and Transmitter (UART) used for serial data communications. Its principal function is to convert parallel data into serial data and vice versa. The UART can handle serial data rates up to 5Mbps. The SC16C2550B is pin compatible with the ST16C2550. It will power-up to be functionally equivalent to the 16C2450. It provides enhanced UART functions with 16-byte FIFOs, modem control interface, DMA mode data transfer. The DMA mode data transfer is controlled by the FIFO trigger levels and the TXRDYn and RXRDYn signals. On-board status registers provide the user with error indications and operational status. System interrupts and modem control features may be tailored by software to meet specific user requirements. An internal loopback capability allows on-board diagnostics. Independent programmable baud rate generators are provided to select transmit and receive baud rates.
16-byte Transmit FIFO to reduce the bandwidth requirement of the external CPU
16-byte Receive FIFO with error flags to reduce the bandwidth requirement of the external CPU
Independent transmit and receive UART control
Four selectable receive FIFO interrupt trigger levels
Software selectable baud rate generator
Standard asynchronous error and framing bits
Transmit, receive, line status and data set interrupts independently controlled
False start-bit detection
Complete status reporting capabilities
3-state Output TTL drive capabilities for bidirectional data bus and control bus
Line break generation and detection Loopback controls for communications link fault isolation
Prioritized interrupt system controls
Modem control functions (CTS\, RTS\, DSR\, DTR\, RI\ and DCD\)
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