Advanced Card Systems Limited ACR1281U Benutzerhandbuch
ACR1281U
Advanced Card Systems Ltd.
Page 15 of 81
HARDWARE DESCRIPTION
1. USB Interface
The ACR1281U is connected to a computer through USB as specified in the USB Specification 2.0.
ACR1281U is working in Full speed mode, i.e. 12 Mbps.
ACR1281U is working in Full speed mode, i.e. 12 Mbps.
Pin
Signal
Function
1
V
BUS
+5V power supply for the reader (Max 200mA)
2
D-
Differential signal transmits data between ACR1281U and PC.
3
D+
Differential signal transmits data between ACR1281U and PC.
4
GND
Reference voltage level for power supply
2. LED Indicator
The LEDs are used for showing the state of the contact and contactless interfaces. The Red LED is
used for showing PICC status and Green LED for ICC.
used for showing PICC status and Green LED for ICC.
Reader States
Red LED
PICC Indicator
Green LED
ICC Indicator
1. No PICC Found or PICC present but
not activated.
A single pulse per ~ 5
seconds
2. PICC is present and activated
ON
3. PICC is operating
Blinking
4. ICC is present and activated
ON
5. ICC is absent or not activated
OFF
6. ICC is operating
Blinking