
REV.-A
2.4.3.2 Print Data Processing
After the initialization, the CPU enters the data waiting state. When data is input from the interface,
the CPU starts reading the data. Besides this process (main routine), the actual printing process is
performed by an interrupt routine. The print data is processed by repeating the main and interrupt
routines.
Array
\
CPU
Data
@-
—D
— ACK
Input
Data
5
–m
~
STRB -----
$
D
@-
Buffer
~
2
t
*
BUSY ----
A
*
@J
Command
Analyze
(Add the
9
4
Attribute)
*: Main
routi”e
-
:
Interrupt ro”tine
(!)
7
fiA
CG
6
;
Down
I
~
Load
~
--r ---
e
CG Copy Araa
+
FIRE
P
Imaga Buffer
I
I
o
Printing
Fig. 2-15. Print Data Flow
The data flow in the Draft printing mode is as follows. Step numbers used in the explanation below
correspond to the data flow numbers used in Figure 2-15.
2-20
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