Asynchronous Communication Interface Adapter
(DUMO
UM6551 / UM6551A
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Description
(DUMO
UM6551 / UM6551A
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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 (...
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