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CCA Release 2.54
ISO-2 PIN-Block Format
The ISO-2 PIN-block format supports a PIN from 4 to 12 digits in length. A PIN
that is longer than 12 digits is truncated on the right.
The following is the ISO-2 PIN-block format:
1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16
┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
│ 2 │ L │ P │ P │ P │ P │P/F│P/F│P/F│P/F│P/F│P/F│P/F│P/F│ F │ F │
└───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┘
Figure E-5. ISO-2 PIN-Block Format
where:
1 Is the value X'1'.
L Is the length of the PIN, which is a 4-bit value from X'4' to X'C'.
P Is the PIN digit, which is a 4-bit value from X'0' to X'9'. The values
of the PIN digits are independent.
F Is a fill digit valued to X'F'.
P/F Is a PIN digit or a fill digit.
Example:
L=6, PIN = 123456, L = X'6'.
PIN block = X'26123456FFFFFFFF'.
E-12 IBM 4758 CCA Basic Services, Release 2.54, February 2005