5.4Electrical Characteristics
(1)Input signal level
The input except RESET are CMOS signal levels. As the input side is pulled up with a resistance of 10 kΩ, it can be used at TTL level.
CMOS Level | TTL Level |
“HIGH” level: 4.0 V MIN | “HIGH” level: 2.4 V MIN |
“LOW” level: 1.0 V MAX | “LOW” level: 0.4 V MAX |
(2)Output signal level
All inputs are TTL level. As the input side is pulled up with a resistance of 10 kΩ, it can be used at TTL level.
“HIGH” level: 2.4 V MIN
“LOW” level: 0.4 V MAX
(3)I/O conditions
< HOST SIDE > | < PRINTER SIDE > | |
DATA | 10k | (HC573 or equivalent) |
|
| |
10k | (HC04 or equivalent) |
|
STB
330
102 102
5k | (7406 or equivalent) |
RESET
104
ACK, BUSY, PE, FAULT | 10k | (HC05 or equivalent) |
|
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