Citizen Systems iDP-3420, iDP-3421, iDP-3423 - page 99

iDP-3420 /3421/3423 User’s Manual
99 CITIZEN
*
**
*E
EE
ET
TT
TX
XX
X-
--
-S
SS
ST
TT
TX
X X
X M
MM
Mo
oo
od
dd
de
ee
e
STX/ETX Mode Start
Sends ENQ
Receives Status
Data Buffer Empty ?
Sends STX
Odd Parity Check ?
Sets Test Byte To
FFH Sets Test Byte To
00
Exclusive ORs Test
Byte and Sent Data
Test Byte
Sends Data to Printer
Last Data in 1 Block ?
1
1
NO
YES
YES
NO
YES
Receives Status
Receives Check Byte
Sends ETX
STX-ETX
Mode End
NO
YES
Status Error ?
Sends ENQ
Check Byte
= Test Byte ?
YES
NO
YES
(Print) Sends CAN
STX-ETX Mode Data
Block Ready to Send ?
NO
RET
NO