Users Manual

Table Of Contents
R01UH0823EJ0110 Rev.1.10 Page 1425 of 1852
Nov 30, 2020
RX23W Group 39. CRC Calculator (CRC)
Figure 39.4 LSB First Data Reception
CRCCR
CRCDOR
Clear CRCDOR
100000 11
000000 00 000000 00
CRCDIR
111100 00
111101 1
1
100011 1
1
100011 11
000000 00 111101 11
111101 1
1
Input
Data
7FFF08
7
0
111101 11 100011
1111110000
7
0
70
7
0
7
0
70
70
70
70
CRC code
CRC code generation
1. 8-bit serial reception (LSB first)
2. Write 83h to the CRC control register (CRCCR)
3. Write F0h to the CRC data input register (CRCDIR)
4. Write 8Fh to the CRC data input register (CRCDIR)
5. Write F7h to the CRC data input register (CRCDIR)
6. Read the calculation result in the CRC data output register (CRCDOR)
CRC code = 0000h
no error
CRCDIR
CRCDIR
7
0
7
0
000000 00 000000 00
CRC code generation
CRC code generation
815
15
15
15
8
8
8
CRCDOR
CRCDOR
CRCDOR