Citizen CL-S700 — условия для сигнала DTR в протоколе связи [136/154]

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3 DTR protocol
(a) Conditions for making DTR signal Ready (High)
The following must be required:
Printer is on line.
Receive buffer has more than 1K bytes available.
Note: When receive buffer has less than 128 bytes available,
DTR signal becomes Busy (Low) level and this Busy (Low)
level is kept until receive buffer has at least 1 K bytes
available.
(b) Conditions for making DTR signal BUSY (Low)
Printer is in error.
Receive buffer has less than 128 bytes available.

Содержание

Изучите условия для установки сигнала DTR в состояние Ready или Busy. Узнайте, как состояние принтера и доступность буфера влияют на сигнал DTR.

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