Timing Chart (Compatibility Mode); Data Reception Control; Buffering - Citizen CBM-1000 User Manual

6.2.3 Timing Chart (Compatibility Mode)

Data input and print timing
Power
Data
nStrobe
Busy
nAck

6.2.4 Data Reception Control

When the Busy signal is at "LOW", the printer can receive data from the host
computer, but when at "HIGH", data reception is not possible.

6.2.5 Buffering

Since the printer can buffer 4K bytes of data, the host computer is immediately
made free.
T2
T3
T1
T6
T4
T5
— 31 —
T1, T2, T3: 0.5 µs MIN
T4: 270 ns MAX
T5: 2.3 µs TYP
T6: 500 ms MIN (At power- on)