Smart card ATR parsing

Enter an ATR (Answer To Reset) and I will parse it for you.

Results

Parsing ATR:

3B F6 91 00 FF 91 81 71 FE 40 00 41 28 00 01 77 B1 E9
TS = 0x3BDirect Convention
T0 = 0xF6Y(1): b1111, K: 6 (historical bytes)
TA(1) = 0x91Fi=512, Di=1, 512 cycles/ETU (7812 bits/s at 4.00 MHz, 9765 bits/s for fMax=5 MHz)
TB(1) = 0x00VPP is not electrically connected
TC(1) = 0xFFExtra guard time: 255 (special value)
TD(1) = 0x91Y(i+1) = b1001, Protocol T=1
----
TA(2) = 0x81Protocol to be used in spec mode: T=1 - Unable to change - defined by interface bytes
TD(2) = 0x71Y(i+1) = b0111, Protocol T=1
----
TA(3) = 0xFEIFSC: 254
TB(3) = 0x40Block Waiting Integer: 4 - Character Waiting Integer: 0
TC(3) = 0x00Error detection code: LRC
----
Historical bytes41 28 00 01 77 B1
Category indicator byte: 0x41 (proprietary format) "(..w."
TCK = 0xE9correct checksum

Possibly identified card: UNKNOWN

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Canonical URL JSON output

Again

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See also

The parsing code is part of pyscard and is available at parseATR.py.

The list of known ATR is also available online at smartcard_list.txt.

My blog contains a serie of artickes about ATR bytes.