Epson FX-286 User Manual - Page 123

Data Transfer Sequence, Interface timing, Printing enabled/disabled signals and control conditions

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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.) 5. Under normal conditions, printer cable pins 11, 12, and 32 are acti- vated when the paper-out condition is detected. The ESCape"8" code disables pins 11 and 32, but not pin 12. Those computers that monitor pin 12 halt printing when the paper is out, making ESCape "8" ineffective. Data Transfer Sequence Interface timing Figure E-1 shows the timing for the parallel interface. Figure E-1. Parallel interface timing Printing enabled/disabled signals and control conditions Table E-2 shows the relationship between printing being enabled or disabled, and the on-line/off-line condition, the printer select signal (SLCT IN), and the receipt of data on/off control character, DC1/DC3. E-3

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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.)
5.
Under normal conditions, printer cable pins
11, 12,
and 32 are acti-
vated when the paper-out condition is detected. The ESCape”8”
code disables pins
11
and 32, but not pin
12.
Those computers that
monitor pin 12 halt printing when the paper is out, making ESCape
“8” ineffective.
Data Transfer Sequence
Interface timing
Figure E-1 shows the timing for the parallel interface.
Figure E-1. Parallel interface timing
Printing enabled/disabled signals and control conditions
Table E-2 shows the relationship between printing being enabled or
disabled, and the on-line/off-line condition, the printer select signal
(SLCT IN), and the receipt of data on/off control character,
DC1/DC3.
E-3