Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 29 CRC FUNCTION
R01UH0042EJ0500 Rev.5.00 Page 1348 of 1513
Aug 12, 2011
CHAPTER 29 CRC FUNCTION
29.1 Functions
• CRC operation circuit for detection of data block errors
• Generation of 16-bit CRC code using a CRC-CCITT (X
16
+ X
12
+ X
5
+ 1) generation polynomial for blocks of data of
any length in 8-bit units
• CRC code is set to the CRCD data register each time 1-byte data is transferred to the CRCIN register, after the initial
value is set to the CRCD register.
29.2 Configuration
The CRC function includes the following hardware.
Table 29-1. CRC Configuration
Item Configuration
Control registers
CRC input register (CRCIN)
CRC data register (CRCD)
Figure 29-1. Block Diagram of CRC Register
CRC data register (CRCD) (16 bits)
CRC input register (CRCIN) (8 bits)
Internal bus
Internal bus
CRC code generator