Citizen CBM-270 Manual De Usuario

CBM-270 User’s Manual

                                                                         

                                CITIZEN

41

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D

D

D

Daaaatttta 

a 

a 

a R

R

R

Reeeecccceeeeiiiivvvviiiinnnng 

g 

g 

g C

C

C

Coooonnnnttttrrrroooollll

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.

7777....3333....5555

B

B

B

Buuuuffffffffeeeerrrriiiinnnngggg
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))

7777....3333....6666

E

E

E

Elllleeeeccccttttrrrriiiiccccaaaal l l l C

C

C

Chhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

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 MAX232

RXD

Mark=(-8V): Stop bit
Space=(+8V): Start bit

TXD

DTR