Classic Electronics Smart 4F Spezifikationen PDF herunterladen (Seite 13)

Smart Cards Lab COMPGA12 University College London

0C 12 bytes follow

RID: A000000306 PC/SC Workgroup

PIX: 03000100000000

SS: 03 ISO 14443 A, part 3

Name: 0001 Mifare Standard 1K

RFU: 00000000

Checksum TCK: 6A (OK)

The Initial Header

It speciﬁes the relationship between A/Z and 0/1 where Z=high voltage,

A=low voltage.

This byte is either:

1. TS = ’3B’ for a direct convention [originates from Germany], where

A=0, Z=1.

2. TS = ’3F’ for the inverse convention [originates from France], with

A=1, Z=0.

Communication Protocols

The ATR speciﬁes (among many other parameters) the protocol used in the

communication between the smart card and the reader. The most popular

protocols are T=0, T=1.

Quiz In GSM cards we use the:

byte-oriented protocol T=0 block-oriented protocol T=1.

Quiz In bank cards we use the:

byte-oriented protocol T=0 block-oriented protocol T=1.

The main diﬀerence between these two is that T=1 is more modern, has

extra CRC checks, T=0 only has parity checks (9 bits transmitted per byte).

Typically we don’t need to know if the serial communication between

the smart card and the reader uses the standard T=0 or T=1. The PC/SC

layer hides this detail from the programmer anyway, in both cases APDUs

are sent and received in the same way. They are just the strings of bytes.

Quiz In communication with an RFID reader we typically use the:

standard protocol T=0 we say that T=CL.

Nicolas T. Courtois 2009-10

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Classic Electronics Smart 4F Spezifikationen Seite 13