Citizen CL-E700 Series All in One Printer User Manual


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Appendixes
Interfaces
XON/XOFF Protocol
Requirements to output X-ON code
Communication is possible when the power is on.
When the receive buer has less than 128 byte available, XOFF code is
output, then the receive buer has at least 1024 bytes available.
Requirements to output the X-OFF code
When the receive buer has less than 128 bytes available
XON
XOFF
Receive buer 16kB
1024 byte
128byte
DTR Protocol
Conditions when the DTR signal is “Ready (High)”
All the following conditions are satised.
The receive buer is 128 byte or more available capacity.
* When the receive buffer has less than 128 bytes available and
the DTR signal has changed to BUSY (Low) status, BUSY status is
maintained until the capacity of the receive buffer has reached
1024 bytes or more.
Conditions when DTR signal is “Busy (Low)”
When the receive buer has fallen to less than 128 byte available.
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