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INTERFACE INFORMATION
Compatible Mode
Pin
No.
Return
Pin No.
Signal Name Direction Description
1 19
Data Strobe
(DSTB)
Input
This signal is a strobe
pulse for reading data
(Data 1 to 8). The printer
reads data when this signal
is low. The pulse width
must be 1 µs or more at
the receiving terminal.
2-9 20-27
Logical 1 signals must go
high at least 1 µs before
the falling edge of the
Data Strobe signal and
must stay high for at least
1 µs after the rising edge.
Data 1 to 8 Input
Data 8 (pin 9) is the most
significant bit; however,
this pin is not used in 7-bit
ASCII communications.
10 28
Acknowledge
(ACK)
Output
This pulse signal indicates
that the printer has
received data and is ready
to accept the next set of
data.
This signal is also sent
when the printer is
switched from offline to
online.
11 29 Busy Output
Data cannot be received
when this signal is high.
This signal is high during
data entry, when the
printer is offline, when the
buffer is full, or when an
error occurs.
12 30
Paper Empty
(PE)
Output
This signal is high when
the printer is out of paper.
D-2 User's Manual