DSB nº 219: Contact – Terminal clock signal frequency (CLK)
Draft EMV® Specification Bulletin No. 219 Second Edition August 2022 Contact – Terminal clock signal frequency (CLK) This Specification Bulletin changes the requirement for the Terminal clock signal frequency (CLK) Please submit any comments you may have via the 'Comment' facility on the EMVCo website at www.emvco.com by end of September 2022.
Applicability
This Specification Bulletin applies to:
- EMV Integrated Circuit Card Specifications for Payment Systems, Book 1 - Application Independent ICC to Terminal Interface Requirements, Version 4.3, November 2011.
Related Documents
- General Bulletin No. 48, First Edition, March 2019 - EMV Contact Specifications Increased Data Communication Speed
- INTERNATIONAL STANDARD, ISO/IEC 7816-3, Identification cards — Integrated circuit cards — Part 3: Cards with contacts — Electrical interface and transmission protocols, Third edition, 2006- 11-01
- EMV® Specification Bulletin No. 219, First Edition August 2019, Terminal clock signal frequency (CLK)
Description
In order to reduce transaction time, EMVCo will enforce the changes outlined below, to ensure that maximum data communication speed is guaranteed in all transactions. The terminals subject to new approval shall use a clock frequency approaching the maximum of 5 MHz starting January 2022. The second edition of this bulletin lowers the minimum clock frequency requirement for approved terminals due for renewal.
countries.
Specification Changes In section 5.5.4 Clock (CLK), remove the last paragraph at the bottom of the page Frequency shall be in the range 1 MHz to 5 MHz and shall not change by more than ± 1% throughout answer to reset and the following stages of a card session (see section 6) unless changed following the answer to reset by means of a proprietary negotiation technique. and replace with the following: The terminals subject to new approval shall use a clock signal frequency signal approaching the maximum of 5 MHz starting January 2022. The clock signal frequency (CLK) shall be as below: Minimum Maximum Unit Date for application 2.8 5 MHz A20p2p2rotvoeedntderDmecinemalsbedru2e0f2o5r renewal: from January 4.7 5 MHz AJapnpuroavryed20te2r6minals due for renewal: from 4.7 5 MHz New terminal approval: from January 2022 Frequency shall not change by more than ± 1% throughout answer to reset and the following stages of a card session (see section 6).
countries.
Legal Notice
The EMV® Specifications are provided “AS IS” without warranties of any kind, and EMVCo neither assumes nor accepts any liability for any errors or omissions contained in these Specifications. EMVCO DISCLAIMS ALL REPRESENTATIONS AND WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT, AS TO THESE SPECIFICATIONS. EMVCo makes no representations or warranties with respect to intellectual property rights of any third parties in or in relation to the Specifications. EMVCo undertakes no responsibility to determine whether any implementation of the EMV® Specifications may violate, infringe, or otherwise exercise the patent, copyright, trademark, trade secret, know-how, or other intellectual property rights of third parties, and thus any person who implements any part of the EMV® Specifications should consult an intellectual property attorney before any such implementation. Without limiting the foregoing, the Specifications may provide for the use of public key encryption and other technology, which may be the subject matter of patents in several countries. Any party seeking to implement these Specifications is solely responsible for determining whether its activities require a license to any such technology, including for patents on public key encryption technology. EMVCo shall not be liable under any theory for any party’s infringement of any intellectual property rights in connection with the EMV® Specifications
countries.