CBM-270 User’s Manual
CITIZEN
41
7777....3333....4444
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
Содержание CBM-270
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