r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 690

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
27. CRC Calculator Function
27.1
Figure 27.1
Table 27.1
Generator polynomial
Selectable functions
The CRC (Cyclic Redundancy Check) calculator detects errors in data blocks. This CRC calculator is enhanced by
an additional feature, CRC snoop, which can monitor reads from and writes to a certain SFR address, and perform
CRC calculations automatically on the data read from and data written to the SFR address.
Figure 27.1 shows the CRC Calculator Block Diagram.
Overview
Item
Preliminary document
Specifications in this document are tentative and subject to change.
CRC Calculator Specifications
CRC Calculator Block Diagram
Bit-order-reverse circuit
CRC generator
CRCD register
• CRC-CCITT
• CRC-16
CRC-CCITT (X
• MSB/LSB select function
• SFR access snoop
16
+ X
CRCIN register
Data bus
Address bus
12
+ X
5
+ 1) or CRC-16 (X
Specifications
SFR snoop register
= ?
16
+ X
15
Snoop enabled
SFR snoop
+ X
block
27. CRC Calculator Function
2
+ 1)
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