HD64F2168 Datasheet, PDF (471/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

1. Serial reception (LSB first)
CRC code
7
07
1 1 110 11 11 0 001
F
7
8
0
1 11
F
Data
7
1 1 110
F
0
0 00
0
Input
2. Write H'83 to CRCCR
CRCCR
7
0
1 0 0 0 0 0 11
CRCDORH
CRCDORL
7
00
00
CRCDOR clearing
0
0 0 0 0 00
0 0 0 0 00
3. Write H'F0 to CRCDIR
7
0
CRCDIR
1 1 1 1 0 0 00
CRC code generation
7
0
CRCDORH 1 1 1 1 0 1 1 1
CRCDORL 1 0 0 0 1 1 1 1
4. Write H'8F to CRCDIR
CRCDIR
7
0
1 0 0 0 1 1 11
5. Write H'F7 to CRCDIR
7
0
CRCDIR
1 1 1 1 0 1 11
CRCDORH
CRCDORL
7
00
11
CRC code generation
0
0 0 0 0 00
1 1 0 1 11
CRC code generation
7
0
CRCDORH 0 0 0 0 0 0 0 0
CRCDORL 0 0 0 0 0 0 0 0
6. Read from CRCDOR
CRC code = H'0000 → No error
Figure 14.48 LSB-First Data Reception
Rev. 3.00, 03/04, page 431 of 830