X9521 Datasheet, PDF (24/26 Pages) Xicor Inc. – Dual DCP, EEPROM Memory

X9521 – Preliminary Information
APPENDIX 2
DCP1 (100 Tap) tap position to Data Byte translation algorithm example. (Example 2)
unsigned DCP100_TAP_Position(int tap_pos)
{
/* optional range checking
*/ if (tap_pos < 0) return ((unsigned)0);
else if (tap_pos >99) return ((unsigned) 96);
/* set to min val */
/* set to max val */
/* 100 Tap DCP encoding formula */
if (tap_pos > 74)
return ((unsigned) (195 - tap_pos));
else if (tap_pos > 49)
return ((unsigned) (14 + tap_pos));
else if (tap_pos > 24)
return ((unsigned) (81 - tap_pos));
else return (tap_pos);
}
REV 1.1.9 1/30/03
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Characteristics subject to change without notice. 24 of 26