Fujitsu FR81S Manuel D’Utilisation
CHAPTER 38: CRC
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: CRC
FUJITSU SEMICONDUCTOR CONFIDENTIAL
15
5.4. Byte and Bit Orders
The byte and bit orders of the CRC is shown below.
This section explains the byte and bit orders using examples. Inputs the following one word to the CRC
calculator.
133.82.171.1 = 10000101 01010010 10101011 00000001
When the byte order is big endian (CRCCR.LTLEND=0), the transmission sequence in bytes is:
10000101
01010010
10101011
00000001
(First)
(Second)
(Third)
(Fourth)
When the bit order is LSB First (CRCCR.LSBFST=1), the transmission sequence in bits is:
10100001
01001010
11010101
10000000
(first)
(last)
Notes:
⋅
When CRCCR.CRCLTE=1 is true, the byte order for the CRC result is changed in 32-bit width both for
CRC16 and CRC32.
⋅
Note that output position for CRC16 is bit31 to bit16.
MB91520 Series
MN705-00010-1v0-E
1284