Citizen Systems CBM-270 - Manual (Page 36)

CBM-270 User’s Manual
(1) Input signal level
All the input signals are at the TTL level.
High level --- 2.0 V at minimum
Low level --- 0.8 V at maximum
(2) Output signal level
All the output signals are at the TTL level.
High level --- 2.4 V at minimum
Low level --- 0.4 V at maximum
(3) Input and output conditions
The STROBE and RESET input signals are pulled up at 10k
Ω
, and the other input signals at 50k
Ω
,
respectively.
[Printer Side] [Host Side]
All the output signals are pulled up at 50k
Ω
.
[Printer Side] [Host Side]
6.3.3 Timing Chart
Data Input and Print Timings