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ii.Because only the remainder is of interest, the MSB (the rightmost bit) may be discarded.
This means the polynomial has the value Hex A001. The CRC algorithm is as follows:
XOR 1st 8 bits
of data with MSB
of result
result with 0x0FF
XOR next 8 bits of data with MSB of result
No
| All |
|
| 8 bits |
|
| shifted? | Yes |
| No |
|
| Shift result |
|
| right 1 bit |
|
No | Is |
|
bit shifted |
| |
|
| |
| out set? |
|
| Yes |
|
| XOR result |
|
| with |
|
| polynomial |
|
Data
finished?
Yes
Append
16 bits of
result to
data
Most significant bit
Least significant bit
Normal Bit Order
| Most significant byte |
| Least significant byte |
|
|
|
|
|
|
Reversed Bit Order
Least significant byte Most significant byte
REVERSED BIT ORDER USED
Least significant bit
Most significant bit
Volume II |