3. PARALLEL INTERFACE
3-1. Interface Specifications
This printer has a parallel interface to communicate with the computer. The operating specifications of the parallel interface are as follows.
(1) | Data transfer rate | : 1000 to 6000 characters per second | ||||
(2) | Synchronization | : Via externally supplied | STROBE | pulses | ||
(3) | Handshaking | : |
| and BUSY signals | ||
ACK | ||||||
(4) | Logic level | : Compatible with TTL level | ||||
3-2. Interface Timing
A C K
About 9ms
Data
STROBE
T
T T
BUSY
T:more than 0.5 microsec.
Fig. 3-1 Interface timing diagram
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