Epson Parallel Interface C82303* - Manual (Page 13)

SPECIFICATIONS
1. Data transmission: S-bit parallel
2. Synchronization: External supplied STROBE pulse
3. Handshaking: Via ACKNLG or BUSY signals
4. Logic level: TTL level
5. RAM capacity: 32K bytes
6. Connector: 57-30360 (Amphenol), 36 pin or its
equivalents .
SELF TEST
The self test mode can be set by the DIP switch 1-3. To set, first
turn off the power to the printer and then change the DIP
switch setting. When the power is turned back on, the new
setting automatically comes into effect. To exit from the self
test, turn off the power and reset the DIP switch.
The interface board first checks the RAM condition. After
checking the RAM, data in the range between
to
is sent to the printer and printed. The print out is only 80
columns wide.
Table 4. Self test mode
Interface timing
The figure below shows the timing for the parallel interface.
Figure 3. Interface timing
I
Note
It takes some time to check the RAM before test printing.
STROBE
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