Keyboard Signals; Key Operation; General Key - Sanyo MBC-550 Series User Manual

Keyboard Signals
The output signals from the keyboard have the following
serial data train:
h
Data
Stop
Start
Data bits
bit
bit
4-
Parity bit
Serial signal
Baud rate: 1200 baud
Data bit: 8 bits
Parity Enable
Even parity
Stop bit: 2 bits
Key Operation
General Key
Depressing these keys causes data signals to be gener­
ated. Depressing the keys continuously for 720 msec or
more results in auto repeat operation.
i
Pressing key
Data
transmission
timing
n
■* «------- > e—
tw
720ms
57 ms
5-33