Contactless smart card interface, Carrier frequency, Card polling – ACS ACR1283L User Manual
Page 9
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ACR1283L – Reference Manual
Version 1.00
www.acs.com.hk
Page 9 of 55
and C7 (I/O) are used. A frequency of 4.8 MHz is applied to the CLK signal (C3).
4.3. Contactless Smart Card Interface
The interface between the ACR1283L and the contactless interface follows the specifications of ISO
14443 with certain restrictions or enhancements to increase the practical functionality of the
ACR1283L.
4.3.1. Carrier Frequency
The carrier frequency for ACR1283L is 13.56 MHz.
4.3.2. Card Polling
The ACR1283L automatically polls the contactless cards that are within the field. ISO 14443-4 Type A,
ISO 14443-4 Type B and Mifare cards are supported.
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