ACR39x – Reference Manual
Version 1.03
www.acs.com.hk
Page 6 of 35
3.0. Smart Card Support
3.1. MCU Cards
The ACR39x is a PC/SC–compliant smart card reader that supports ISO 7816 Class A, B and C (5 V,
3 V, and 1.8 V) smart cards. It also works with MCU cards following either the T=0 and T=1 protocol.
The card ATR indicates the specific operation mode (TA2 present; bit 5 of TA2 must be 0) and when
that particular mode is not supported by the ACR39x, it will reset the card to negotiable mode. If the
card cannot be set to negotiable mode, the reader will then reject the card.
When the card ATR indicates the negotiable mode (TA2 not present) and communication parameters
other than the default parameters, the ACR39x will execute the PPS and try to use the communication
parameters that the card suggested in its ATR. If the card does not accept the PPS, the reader will
use the default parameters (F=372, D=1).
Note: For the meaning of the aforementioned parameters, please refer to ISO 7816-3.
3.2. Memory-based Smart Cards
ACR39x works with several memory-based smart cards such as:
•
Cards following the I2C bus protocol (free memory cards) with maximum 128 bytes page with
capability, including:
o
Atmel®: AT24C01/02/04/08/16/32/64/128/256/512/1024
o
SGS-Thomson: ST14C02C, ST14C04C
o
Gemplus: GFM1K, GFM2K, GFM4K, GFM8K
•
Cards with intelligent 1 KB EEPROM with write-protect function, including:
o
Infineon®: SLE4418, SLE4428, SLE5518 and SLE5528
•
Cards with intelligent 256-byte EEPROM with write-protect function, including:
o
Infineon®: SLE4432, SLE4442, SLE5532 and SLE5542
