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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

–m

STRB -----

Buffer

BUSY ----

Command

Analyze

(Add the

Attribute)

*: Main

routi”e

Interrupt ro”tine

(!)

fiA

;

Down

Load

--r ---

CG Copy Araa

FIRE

Imaga Buffer

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

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 141 142

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Epson LX-86TM Dokumentacja Strona 52