Datasheet

Section 14 CRC Operation Circuit (CRC)
Rev. 3.00 Sep. 28, 2009 Page 323 of 710
REJ09B0384-0300
CRCCR
CRCDORH
CRCDORL
CRCDOR clearing
2. Write H'83 to CRCCR
1
7
0 0 0 00
0
7
0
7
0
7
0
1
1
0 0 0 0 0 000
0 0 0 0 0 000
CRCDIR
CRCDORH
CRCDORL
CRC code generation
3. Write H'F0 to CRCDIR
1 1 1 1 0 00
0
1 1 1 1 0 11
1
1 0 0 0 1 11
1
CRCDIR
CRCDORH
CRCDORL
CRC code generation
4. Write H'8F to CRCDIR
1
7
0 0 0 11
0
7
0
7
0
7
0
1
1
0 0 0 0 0 000
1 1 1 1 0 111
CRCDIR
CRCDORH
CRCDORL
CRC code generation
5. Write H'F7 to CRCDIR
1 1 1 1 0 11
1
0 0 0 0 0 00
0
0 0 0 0 0 00
0
CRC code = H'0000 → No error
CRC code
Input
Data
6. Read from CRCDOR
7
7
7FFF08
7
00 0
1. Serial reception (LSB first)
1 1 1 1 0 1
1
1
1 0 0 0 1 11
1
1 1 1 1 0 00
0
Figure 14.4 LSB-First Data Reception