SmartCard学习之ATR

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EMTG97:

ATR: 3B 6C 00 02 43 01 86 38 94 DC 19 42 1E 14 52 D5

• TS = 3B --> Direct Convention
• T0 = 6C, Y(1): 0110, K: 12 (historical bytes)
  TB(1) = 00 --> VPP is not electrically connected
  TC(1) = 02 --> Extra guard time: 2
• Historical bytes: 43 01 86 38 94 DC 19 42 1E 14 52 D5
  Category indicator byte: 43 (proprietary format)

TS…………………………………………表示正向或者反向约定，高低电平
T0…………………………………………格式字符，强制性
TA(i) TB(i) TC(i) TD(i)…………… 接口字符，可选的
T1 T2…Tk………………………………历史字符，可选的
Tck……………………………………… 检测字符，有条件的

TS: 3B
T0: 6C

T0: 6C = 01101100
0 1 1 0 1 1 0 0

0	1	1	0	1	1	0	0
b8	b7	b6	b5	b4	b3	b2	b1
TD(1)	TC(1)	TB(1)	TA(1)
null	00	02	null

Y1: 0110	K: 1100 = 12
TD(1) TC(1) TB(1) TA(1)	history bytes
b8 b7 b6 b5	b4 b3 b2 b1
0 1 1 0	1100
00 02	43 01 86 38 94 DC 19 42 1E 14 52 D5