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DFX-8500
1.3.3 Serial Interface
0 Synchronization : Asynchronous
0
Signal level (ELA-232D) :
.
MARK (logical 1) : -3vto-25v
.
SPACE (logical 0) : +3vto+25v
0
Word length :
.
Start bit : 1 bit
.
Data bii : 8 bit
.
Parii bit :
Odd, Even, Non, of Ignore
.
Stop bit : 1 bit or more
cl Baud rate :
2400,4600,9600 or 19200 bps
P
Handshaking : DTR signal or X-ON I X-OFF
n
DTR=MARK, X-OFF :
Indicates that the printer cannot receive data.
.
DTR=SPACE, X-ON : Indicates that the printer is ready to receive data.
Note: The DTR signal is MARK and X-OFF code (DC3, 13h) is transmitted when the rest of the
input buffer becomes 25byte. The DTR signal is SPACE and X-ON code (DCl, llh) is
transmitted when the rest of the input buffer is regained 256-byte.
cl Error handling :
When parity error is detected, the received byte is changed to the
0
Connector :
“*’ character code. Overrun error and framing error are ignored.
25 pin sub-miniature D-shell connector (female)
0
Connector pin assignment and signals :
Refer to Table l-12.
Table 1-12. Signal and Connector Pin Assignment (EIA-232D)
1 GND
Other 1 NC
I-
I Not used. Not connected.
Note: *In/Out refers to the diraction of signal flow from the printer’s point of view.
1.3.4 Optional Interface
Type-B and Type-B level 2 optional interfaces are available (Refer to Table i-1.).
l-22
Rev. A