ACR128 Dual Interface Smart Card Reader
4.4 USB Interface
The ACR128U is connected to a computer through USB interface as specified in the USB
Specification 2.0. The ACR128U is working in low speed mode, i.e. 12 Mbps.
Table 6: USB Interface Wiring
Pin Signal
Function
1
VBUS
+5V power supply for the reader (~200mA)
2 D-
Differential signal transmits data between
ACR128U and PC.
3 D+
Differential signal transmits data between
ACR128U and PC.
4
GND
Reference voltage level for power supply
NOTE: In order for the ACR128U to function properly through USB interface, the ACS proprietary device driver
has to be installed. Please refer to the Device Driver Installation Guide for more details. [VID = 0x072F; PID =
0x2100]
4.5 ICC Interface (Contact Smart Card)
A landing type Smart Card Acceptor is used for providing reliable operations. The minimum life
cycle of the acceptor is about 300K times of card insertion and removal.
4.6 SAM Interface (Contact Smart Card)
One SAM socket is provided for high-security application requirement.
4.7 PICC Interface (Contactless Smart Card)
A built-in antenna is used for communication between the PCD and PICC.
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ACR128 API
Version 1.7 May 2008
