Mustek PP3000 Manuál s instrukcemi stáhnout pdf (Strana 41)

4 - 13

TM

CHAP. 4

TECHN…

Sends ENQ

Receives status

byte

Is the

data buffer

empty ?

Sends STX signal

Is it

odd parity

check?

Set test byte FFH

YES

NO

Set test byte 00H

Acquires the exclusive OR of the

content of the test byte and the

data to send, then it is used as the

content of the test byte

Transmits the data to

the printer

Is this

the last data in

a block ?

YES

YES

YES

YES

NO

NO

NO

NO

Sends an ENQ

signal

Sends CAN

Sends ETX

Receives a check

byte

Receives status

signal

Is there a

data block in the STX-

ETX mode?

Check byte

= test byte?

Is the

status an

error?

NO

YES

Starts the STX-

ETX mode

Ends the STX -

ETX mode

RET

Horizontal

parity check

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