Parallel Interface; Data Transfer Sequence; Interface Timing; Signal Relationships - Epson FX-80 User Manual

4. Data transfer must be carried out by observing the ACKNLG or
BUSY signal. (Data transfer to this printer can be carried out only
after receipt of the ACKNLG signal or when the level of the BUSY
signal is LOW.)
Under normal conditions, printer cable pins
5.
activated when the paper-out condition is detected. The
ESCape"8" code disables pins
computers that monitor pin 12 halt printing when the paper is out,
making ESCape"8" ineffective.

Data Transfer Sequence

Interface timing

Figure K-1 shows the timing for the parallel interface.

Signal relationships

Table shows the way data entry is handled in the On-Line and
K-2
Off-Line states by showing the relationships between seven signal sets.
Figure K-1. Parallel interface timing
11, 12,
and but not pin
11 32,
and are
32
Those
12.
335