Operating instructions

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7.3.4 Data Receiving Control
If DTR/DSR control has been selected, the data from the host side will be received
when the BUSY signal is at “Low,” but not received when at “High.” If DTR/DSR
has not been selected, the data from the host side will be received after sending
XON, but not after sending XOFF.
7.3.5 Buffering
To transfer the data to the input buffer, there are two control signals available: DTR
signal and TXD signal. The host side is immediately freed, since the data can be
buffered up to 2 KB.
(1) DTR signal (See 7.3.1-(2))
(2) TXD signal (See 7.3.1-(3))
7.3.6 Electrical Characteristics
RS-232C Circuit
Input (RXD, DSR)
Output (TXD, DTR)
[Printer Side] [Host Side]
Equivalent to MAX232
Mark=(–8V): At Busy
Space=(+8V): At Ready
Equivalent to MAX232
Mark=(–8V): Stop bit
Space=(+8V): Start bit
Mark=(–8V): 1
Space=(+8V): 0
TXD
DTR
[Printer Side] [Host Side]
RXD