x-Lab Dot Matrix Printer XDP-321 User's Manual
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A.2 Interface Specifications
Your printer can be equipped with a parallel interface, a USB interface or a serial interface. The printer
switches automatically to the appropriate interface when it receives data.
A.2.1 Parallel Interface
The parallel interface has the following characteristics.
Data format:
8-bit
Synchronization: /
STROBE pulse
Handshaking:
BUSY and /ACKNLG signals
Signal level:
TTL compatible
A.2.2 USB Interface
The following table provides the standardized contact terminating assignments by number and color
for Series “A” and Series “B” connectors of Full-speed USB 2.0.
A.2.3 Serial Interface
The serial interface has the following characteristics.
Baudrate (bps):
1200 bps, 2400 bps, 4800 bps, 9600 bps, 19200 bps (selectable)
Data length:
7 or 8-bit (selectable)
Start bit:
1 bit
Parity bit:
Odd, even, or none (selectable)
Stop bit:
1 bit
Handshaking:
DTR protocol, XON/XOFF protocol (selectable)
Contact Number
Signal Name
Color
1
VBUS
Red
-
D
2
White
+
D
3
Green
4
GND
Black
2 1
3 4
Figure A-2.2 USB-B type connector
Figure A-2.1 Parallel interface connector pin numbers
