AN2646 datasheet(8/43 Pages) STMICROELECTRONICS

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ISO 7816 – protocol overview

AN2646 - Application note

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ISO 7816 – protocol overview

3.1

Introduction

"ISO 7816: Identification cards -- Integrated circuit(s) cards with contacts" provides the basis

to transition the relatively simple identification card from a token that can be compromised

through forgery, theft, or loss into a tamper-resistant and "intelligent" integrated circuit card

(ICC), more popularly known as a smartcard. ISO 7816 includes at least six approved parts

and has several additional parts under review:

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Part 1: Physical characteristics

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Part 2: Dimensions and location of the contacts

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Part 3: Electrical interface and transmission protocols

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Part 3: Amendment 2-Revision of protocol type selection

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Part 4: Organization, security and commands for interchange

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Part 5: Registration of application providers

3.2

ISO 7816-2 – pin location

ISO 7816-2 specifies an ICC with eight electrical contacts present in a standardized position

on the front face of the card. These are referred to as C1 through C8. Some of these

contacts are electrically connected to the microprocessor chip embedded within the card;

some are not, having been defined to allow for enhancements but unused at the present

time. Figure 3 shows the contact positions.

Figure 3.

Contact definitions for smartcards

AN2646 Datasheet(PDF) 8 Page - STMicroelectronics