GM16C550

GM16C550 GM16C550 ASYNCHRONOUS COMMUNICATIONS ELEMENT WITH FIFOs Descriptions The GM16C550 is an asynchronous communications element (ACE) that is functionally equivalent to the GM16C450, and addition-ally incorporates a 16byte FIFOs are available on both the transmitter and receiver, and can be activated by placing the device in the FIFO mode. After a reset, the registers of the GM16C550 are identical to those of the GM16C450. The UART performs serial-to-parallel conver- sion on data characters received from a peri-pheral device or a MODEM, and parallel-to- serial conversion on data characters received from the CPU. The CPU can read the com- plete status of the UART at any time during the functional operation. Status information reported includes the type and condition of the transfer operations being performed by the UART, as well as any error conditions (parity, overrun, framing, or break interrupt). Features Fully compatible with GM16C450. Modem controm signals include CTS , RTS , DSR , DTR , RI and - DCD . l Programmable serial characteristics: — 5-, 6-, 7- or 8-bit characters — Even-, odd-, or no-parity bit generation and detection — 1-, 11/2- or 2-stop bit generation — Baud rate generation (DC to 256K baud) l 16 byte FIFO reduces CPU interrupts. l Independent control of transmit, receive, line status, data set interrupts, FIFOs. l Full status reporting capabilities l Three-state, TTL drive capabilities for biderectional data bus and control bus. l 40DIP/44PLCC l l P...