Embedded EEPROM Specification - picmg
Embedded EEPROM Specification - picmg
Embedded EEPROM Specification - picmg
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2. Allows for the possibility of having data/structures outside the CRC.<br />
6.10.2 Block Elements<br />
6.10.2.1 CDBHdr<br />
See ' 6.1 Common Dynamic Block Header' on page 31.<br />
6.10.2.2 CrC16<br />
This two-byte field contains the calculated 16-bit CRC-CCITT (polynomial 0x1021) for previous bytes<br />
in the <strong>EEPROM</strong>. The following algorithm and data structures (shown in C) are to be followed in<br />
calculating and checking the code. The polynomial calculated with this algorithm is x16 + x12 + x5 + 1.<br />
6.10.2.3 Reserved0<br />
Pack Byte to align block size on 2 byte boundary.<br />
6.10.3 Example Block<br />
Table 6-20: CRC16 Block Example<br />
Offset Width Name Value Description<br />
0 1 Block Id 0xF2 CRC Block<br />
1 2 Block Length 3 Dynamic Block Size (Words)<br />
3 2 CRC16 0xA741 CRC16 Checksum<br />
5 1 Reserved0 0x00 Word Alignment Pack Byte<br />
PICMG® EEEP R1.0 <strong>Embedded</strong> <strong>EEPROM</strong> <strong>Specification</strong>, August 8, 2010 page 48 of 84
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