EC-PM-530B User's Manual
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35
+5V
+5V supply
OUT
Pull up to 5V by the 3.3K
Ω
resistor.
36 /SLCTIN
Printer is
selected and
answered.
IN
Only when this signal level is low, can
the data be put into the printer.
(4) Time sequence of Parallel to transmit data (as shown by Figure 5-3):
5.2.3 USB Interface
1. The USB interface is a USB-B type connector (as shown by Figure 5-4):
USB2.0 (Full-Speed) interface connector A and B’s signal wire assignment is shown as the
following table:
Contact Number
Signal Name
Color
1 VBUS Red
2 D-
White
3 D+
Green
4 GND
Black
BUSY
/
ACK
DAT
/
STR
0.5
μ
s
0.5
μ
s
0.5
μ
s
5
μ
s
5
μ
s
Figure 5-3 Time sequence of parallel to transmit data
* The “Direction” in the title column means the flow direction of printer signal to the printer.
* The “Return” in the title column means pair-twist return. You must confirm that the
interface cable is a pair-twist shielding line, and every signal line is looped with ground
line and pair-twisted together. Shielding line should be connected with the frame ground
of host computer and printer.
* All the interface state is based on TTL level. The rising and falling time of signal must be
less than 0.2 ms.
* The data transfer must comply with the specification of ACKING or Busy signal. Only when
the level of ACKING or Busy signal is low can data be transferred.
EC Electronics, Ltd.
www.eclinepos.com
EC Electronics, Ltd
No. 221 Wai Yip Street, Kwun Tong
Kowloon, Hong Kong
TEL : (852) 3590 6397
FAX : (852) 3590 6497
E-MAIL : [email protected]
