HP V8.5 manual Print mode, Mode signals

5

T H E O R Y O F O P E R A T I O N

Print mode

When the host asserts the PRINT mode signal, the plotter can generate ASCII characters. Table 5-5 shows the timing relationships for print mode signals.

Signal	Signal Name	Active	Operation
Mnemonic		Level
			Selects either print or plot
PRINT	Print Mode	High	mode. When signal is high,
			plotter is in print mode.
SPP	Simultaneous	Low	Not used
	print/plot mode

Table 5-5. Mode signals

ASCII characters are produced as plot patterns on a 16 x 20 dot matrix through the use of a Character Generator ROM. When one complete print line of ASCII-coded data is received, the data is converted into plot patterns. Each character line is executed over 20 plot scans.

5-8 V8.5eRev2.2.2002