Table of Contents
Advertisement
Section 16 Serial Communication Interface (SCI, IrDA, and CRC)
16.11.4 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 16.50 LSB-First and MSB-First Transmit Data
Rev. 3.00 Jan 25, 2006 page 472 of 872
REJ09B0286-0300
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
(1)
(2)
0
0
7
0
7
0
(4)
(3)
(2)
0
7
0
7
(3)
(4)
(5)
0
7
0
(1)
Output
CRC code
0
7
0
(6)
Advertisement
Table of Contents
