DPU-30-0B-E Seiko Instruments, DPU-30-0B-E Datasheet - Page 26

• Manufacturer Part Number: DPU-30-0B-E
• Description: Printers PNL MNT 58MM EZ-OP
• Manufacturer: Seiko Instruments

Specifications of DPU-30-0B-E

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Data timing for hardware control
2. Xon/Xoff control
Data timing for Xon/Xoff control
The data transmission from a host computer is controlled through the exchange of Xon(11
command and Xoff(13
When the data stored in the input buffer of the printer exceeds 4,046 bytes, the printer sends the
Xoff command to the host computer.
Upon the reception of the Xoff command, the host computer stops to send the data.
If the data stored in the input buffer of the printer falls below 3,995 bytes, the printer sends the
Xon command to the host computer.
Upon the reception of the Xon command, the host computer resumes sending the rest of the
data.
∗ When the printer fails (for example, paper-out), the printer sends the Xoff command to the
host computer.
And then, after the printer gets back to normal, the printer sends the Xon command to the
host computer.
ON -L I NE
OF F- L IN E
OFF-LINE
Paper out
OFF-LINE
ON-LINE
OFF-LINE
Paper out
ON-LINE
ON-LINE
紙 無 し
ﾌ ﾟ ﾘﾝ ﾄ
紙 無 し
ﾌﾟﾘﾝﾄ
RT S
R x D
RxD
RTS
TxD
Print
RTS
RxD
Print
RTS
RxD
RxD
Power ON
電 源 ON
Power ON
電 源 ON
16
) command between the printer and the host computer.
Xon
Xon
40 46 ﾊﾞ ｲ ﾄ 以 上
4046ﾊﾞｲﾄ 以 上
Buffer
4,046 bytes
or more
Buffer
4,046 bytes
or more
ﾊﾞｯﾌｧ
ﾊﾞ ｯ ﾌｧ
4-4
Xoff
Xoff
ﾊﾞｯﾌｧ
3 995 ﾊﾞｲﾄ 以 下
Buffer
3,995 bytes or less
ﾊ ﾞ ｯﾌ ｧ
Buffer
3,995 bytes or less
3 99 5 ﾊﾞ ｲ ﾄ 以 下
Xon
Xon
Xoff
Xoff
Xon
Xon
16
)