UM6551

(DUMO UM6551 / UM6551A .!,.i.:i;::;t'1~?:t;if~I;);fQ'0~0i~:~::;':':Ji:il~'i:!f!:,:t!:P?:1'i:;i7(ij~~jr~iil{t!~ti!!~tf01;iz;11:;;ji::~;JrJ~Y%;;~i:1~~j,I!~ Asynchronous Communication Interface Adapter Features On-chip baud rate generator: 15 programmable baud rates derived from a standard 1.8432 MHz external crystal (50 to 19,200 baud) Programmable interrupt and status register to simplify software design Single +5 volt power supply Serial echo mode False start b it detect io n 8-bit bi-directional data bus for direct communica- tion with the microprocessor External 16x clock input for non-standard baud rates (up to 125k baud) Programmable: word lengths; number of stop bits; and parity bit generation and detection Data set and modem control signals provided Parity: (odd, even, none, mark, space) Full-duplex or half-duplex operation 5,6,7,8, and 9 bit transmission General Description The UM6551 is an Asynchronous Communication Adapter (...