Advertisement
14.4
Note on CRC Operation Circuit
Note that the sequence to transmit the CRC code differs between LSB-first transmission and
MSB-first transmission.
1. CRC code generation
After specifying the operation method, write data to CRCDIR in the sequence of (1) → (2) → (3) → (4).
CRCDIR
CRCDORH
CRCDORL
2. Transmission data
(i) LSB-first transmission
(ii) MSB-first transmission
Output
Figure 14.6 LSB-First and MSB-First Transmit Data
7
(1) → (2) → (3) → (4)
CRC code generation
7
(5)
(6)
CRC code
7
0
7
0
7
(5)
(6)
7
0
7
0
7
(2)
(1)
Section 14 CRC Operation Circuit (CRC)
0
0
7
0
7
0
(4)
(3)
(2)
CRC code
0
7
0
7
(3)
(4)
(5)
Rev. 1.00 Mar. 12, 2008 Page 503 of 1178
0
7
0
Output
(1)
0
7
0
(6)
REJ09B0403-0100
Advertisement
