Citizen Systems iDP-562 User Manual download pdf (Page 21)

iDP-562 User’s Manual

CITIZEN

(2) Input Control for Double Buffer

Double buffer transfer is made as follows.

1. The computer transfers 1

and 2

BYTE of DATA after checking READY condition.

2. The printer continues BUSY condition for receiving 2

BYTE of DATA.

3. The computer transfers 3

BYTE of DATA after checking READY condition.

The printer expects Double Buffer transfer at the first stage. Therefore, after completion of 1

BYTE of DATA

reception, the printer waits for 2

BYTE of DATA. The printer recognizes Single Buffer transfer for the absence

of START BIT after 1 ~ 2 STOP BIT.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 34 35

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Citizen Systems iDP-562 User Manual Page 21