Citizen PPU-231 Manual De Usuario

PPU-231 User’s Manual

CITIZEN

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 4 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)

[Printer Side] [Host Side]

Output (TXD, DTR)

[Printer Side]

[Host Side]

Equivalent to MAX232

Mark=(-8V): At Busy

Mark=(-8V): 1

Space=(+8V): At Busy

Space=(+8V): 0

Equivalent to MAX232

RXD

Mark=(-8V): Stop bit

Space=(+8V): Start bit

TXD

DTR