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SB nº 109: FDT tolerance (Spec Change)

v1.0 Specification Bulletins
Contactless

Specification Bulletin No.109 First Edition October 2012 FDT tolerance This specification bulletin aligns ISO/IEC 14443 and EMV regarding FDT tolerance

Effective Date

This specification bulletin is effective from November 2013 at which time any affected or new type approval testing will come into effect.

Applicability

This specification bulletin applies to:

  • EMV Contactless Specifications for Payment Systems, Book D – EMV Contactless Communication Protocol Specification, Version 2.2 – June 2012.

Related Documents

None

Description

There is currently a difference between ISO/IEC 14443 and EMV regarding the tolerance of FDT measurement. This specification bulletin aligns the EMV specification with ISO/IEC 14443 and increases the margin between the PCD and PICC requirements.

http://www.emvco.com.

Specification Change In section 4.8.1, change the Requirements 4.19 as follows: Requirements 4.19: FDTA,PICC PCD PICC 4.8.1.1 Following the end of a PCD command, the PCD shall be able to receive the start of a PICC response at a time aligned to the grid as defined in Figure 4.14, Table 4.2, and Table 4.3 with a tolerance of ‐1/fC to 0.4μs+1/fC.

4.8.1.2 The PICC shall align the first modulation edge within the start bit of a PICC response to the grid as defined in Figure 4.14, Table 4.2, and Table 4.3 with a tolerance of 0 to 0.4μs.

http://www.emvco.com.