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Friday, January 31, 2020

ATR statistics: TB4 - Global after T=15 in TDi–1

Article from the series "ATR statistics".

TB4 - Global after T=15 in TDi–1

For T=15 protocol TBi the coding is defined in the document ETSI TS 102 221 V10.0.0 (2011-12) chapter "6.3.3 Global Interface byte".

Table 6.7: Coding of the first TBi (i > 2) after T = 15 of the ATR

b8b7b6b5b4b3b2b1Meaning
00000000No additional global interface parameters supported
1--1----Low Impedance drivers and protocol available on the I/O line available (see clause 7.2.1)
11------Inter-Chip USB UICC-Terminal interface supported as defined in TS 102 60
1-1-----UICC-CLF interface supported as defined in TS 102 613
1---1---Secure Channel supported as defined in TS 102 484
1---11--Secured APDU - Platform to Platform required as defined in TS 102 484
NOTE: Any other value is RFU.

TB4#%
207099.90 %
0x8320.10 %


Only 2 cards have a TB4 in the ATR. They are:
The 2 cards use the same value for TB4: 0x83 that is RFU.