8
these two kinds is as showed in Picture3-2:
Handshaking Mode
Data
Direction
RS-232C interface signal
Mark Control
data can
enter
"BUSY" signal line is in
"SPACE" status
data can't
enter
"BUSY" signal line is in
"MARK" status
X-ON/ X-OFF
Control
data can
enter
Send X-ON code "11H" on
"TXD" signal line
data can't
enter
Send X-OFF code "13H"
on "TXD" signal line
Picture3-2 Two handshake methods
3.1.2 USB interface connection
Signal
name
PH-6PIN
Source
Explanation
VDC
1
－
Printer operating
voltage(5.0~8.5V)
NC
2
－
D-
3
－
USB differential signal
D+
4
－
USB differential signal
GND
5
－
Signal ground
EN
6
Printer
High level enables printer, low
level turns off printer
