公开(公告)号：EP0936537B1

公开(公告)日：2008-07-23

申请号：EP99300995.0

申请日：1999-02-11

Applicant: STMicroelectronics Limited

Inventor： Jones, Andrew Michael ,  Homewood, Marc Owen

IPC: G06F9/30 ,  G06F11/10

CPC classification number: G06F9/30018 ,  G06F11/10

公开(公告)号：EP0936537A1

公开(公告)日：1999-08-18

申请号：EP99300995.0

申请日：1999-02-11

Applicant: STMicroelectronics Limited

Inventor： Jones, Andrew Michael ,  Homewood, Marc Owen

IPC: G06F9/30 ,  G06F11/10

CPC classification number: G06F9/30018 ,  G06F11/10

Abstract: A cyclic redundancy check value is computed by iterating a loop in which the contents of an operand (50) having a first CRC value (51) and a data value (52) are shifted 1 bit to the end at which the CRC value is located, and a generator value (55) is exclusive-ORed into corresponding respective bits of the operand only if the bit shifted out of the operand by the shift was set, and this is repeated until a data byte has been displaced entirely and a modified cyclic redundancy check value (51) occupies the most significant bytes but now incorporates the original data byte in modified form.

Abstract translation: 通过迭代循环来计算循环冗余校验值，其中具有第一CRC值（51）和数据值（52）的操作数（50）的内容被移位1位到CRC值所在的结尾 ，并且只有当设置了从操作数移出移位位的位后，发生器值（55）才被异或运算到操作数的对应的各个位中，并重复该操作数，直到数据字节完全移位，并且修改了循环 冗余校验值（51）占用最高有效字节，但现在将原始数据字节并入修改后的形式。