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iDP3221 User’s Manual
27
CITIZEN
6.3.2 Electrical Characteristics
(1) Input signal level
The STB and DATA1-8 input signals are at the C-MOS level. Other input signals are at the TTL level.
C-MOS Level:
High level --- 4.0 V at minimum
Low level ---- 1.0 V at maximum
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 C-MOS level.
High level --- 2.4 V at minimum
Low level ---- 0.4 V at maximum
(3) Input and output conditions
The DATA1-8 input signals are pulled up at 50kΩ, and the other input signals at 50kΩ.
[Printer Side] [Host Side]
The DATA1-8 output signals are pulled up at 50kΩ and the other output signals 3.3kΩ.
[Printer Side] [Host Side]