eecs 598-2:smartcards
lecture 4

peter honeyman
citi

answer to reset
  o  sequence of up to 33 bytes, conveyed asynchronously
  o  10 bit character format
     o  start, 8 ( data, even parity
        o  total number of 1's is even
        o  bit time = 372/f
        o  natural frequency for 9.6 kbps is 3.5712 MHz
  o  direct convention: H = 1, L = 0
  o  inverse convention: H = 0, L = 1

answer to reset
  o  TS
     o  bit signalling and ordering
     o  establishes direct or inverse convention
        o  TS = 0x3b: direct convention
           o  lsb first (same as rs-232)
        o  TS = 0x3f: inverse convention
           o  msb first
           o  0x03 when viewed direct

T0
  o  mandatory format character
  o  announces the first interface characters and all the historical characters

TA(i), TB(i), TC(i), TD(i)
  o  optional interface characters, some global (data rate, transmission protocol), some specific
  o  presence is indicated by a bit map in T0
  o  TA1: bit rate
  o  TB1, TB2: vestigial
  o  TC1: stop bits
  o  TD(i) has bitmap for T{A,B,C,D}(i+1)

answer to reset
  o  T1, T2, ..., TK
     o  optional historical characters
     o  presence indicated by a number coded in the format character
     o  discretionary values, e.g., id
  o  TCK
     o  optional xor check character
     o  presence depends on the value(s) in some interface characters

some atr strings

some atr strings

some atr strings

some atr strings

transmission protocol
  o  T=0: asynchronous, half-duplex, byte-oriented
     o  break protocol (?)
  o  T=1: asynchronous, half-duplex, block-oriented
  o  T=2: asynchronous, full-duplex, block-oriented
  o  T=14: national norms

transmission protocol
  o  T=other: not prominent
  o  synchronous standards exist for legacy memory cards

T=0
  o  CLA: class designation
     o  0, 8x, 9x, B0 to CF
  o  INS: instruction
     o  always even, always acked by self
  o  P1, P2: instruction specific
  o  P3: length

T=1
  o  I-block: information
     o  application layer data transparency
  o  R-block: reception and acknowledgement
     o  alternating bit
     o  ack or nak
  o  S-block: system
     o  protocol control

T=1
  o  NAD: node address, vestigial
  o  PCB: protocol control byte
     o  signals {I,R,S}-block
  o  LEN: 
  o  APDU
  o  EDC