HD64F2168 Datasheet, PDF (472/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

1. Serial reception (MSB first)
Data
Input
7
1 1 110
F
00
0
07
01
1 101
E
CRC code
07
1 11 0 0 0 1 1
F
1
0
1 11
F
2. Write H'87 to CRCCR
CRCCR
7
0
1 0 0 0 0 1 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
CRCDIR
1 1 110
0
0 00
CRC code generation
7
0
CRCDORH 1 1 1 0 1 1 1 1
CRCDORL 0 0 0 1 1 1 1 1
4. Write H'EF to CRCDIR
CRCDIR
7
0
1 1 1 0 1 1 11
5. Write H'1F to CRCDIR
7
CRCDIR
0 0 011
0
1 11
CRCDORH
CRCDORL
7
00
00
CRC code generation
0
0 1 1 1 11
0 0 0 0 00
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 14.49 MSB-First Data Reception
Rev. 3.00, 03/04, page 432 of 830