RX610 Group
21. CRC Calculator (CRC)
R01UH0032EJ0120 Rev.1.20
Page 685 of 1006
Feb 20, 2013
21.4
Usage Notes
21.4.1
Module Stop Function Setting
Operation of the CRC calculator can be disabled or enabled using the module stop control register B (MSTPCRB). The
initial setting is for operation of the CRC calculator to be halted. Register access is enabled by clearing the module stop
state. For details, see section 8, Low Power Consumption.
21.5
Note on Transmission
Note that the sequence of transmission for the CRC code differs according to whether transmission is LSB-first or
MSB-first.
CRCDIR
CRCDOR
1. CRC code
CRC code generation
After specifying the method for generation calculation, write data to CRCDIR in order of (1), (2), (3), and (4).
Output
15
7
7
0
0
0
0
7
0
0
0
0
7
7
7
7
(1)
CRC code (H)
CRC code
Output
7
7
0
0
0
0
0
0
7
7
7
7
2. Transmission data
CRC code (L)
(H)
(L)
(4)
(3)
(2)
(1)
(i) When transmission is LSB-first
(ii) When transmission is MSB-first
(1)
(2)
(3)
(4)
(H)
(L)
CRC code
CRCDIR
7
0
(2)
CRCDIR
7
0
(3)
CRCDIR
7
0
(4)
7
8
Figure 21.6 LSB-First and MSB-First Data Transmission
Summary of Contents for RX600 Series
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