Citizen Systems CBM-230/231 - Manual (Page 25)

CBM-230/231 User’s Manual
CITIZEN 25
6.3.3 Timing Chart
(1) Data input and printing timing
T1, T2, T3
0.5µs MIN
T4 270 ns MAX
T5 2.3 µs TYP
T6 500 ms MIN (at power-on)
6.3.4 Data Receiving Control
When the BUSY signal is at LOW, the data from the host side can be received, but when at HIGH, it cannot
be received.
6.3.5 Buffering
A size of the input buffer can be selected by setting the DIP switch segment DS1-4.
When a 4KB buffer is selected, the host side is immediately free because a large amount of data can
be buffered.