Atmel SAM4S-EK2 Atmel ATSAM4S-EK2 ATSAM4S-EK2 Data Sheet
Product codes
ATSAM4S-EK2
349
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
23.
Cyclic Redundancy Check Calculation Unit (CRCCU)
23.1
Description
The Cyclic Redundancy Check Calculation Unit (CRCCU) has its own DMA which functions as a Master with the Bus
Matrix. Three different polynomials are available: CCITT802.3, CASTAGNOLI and CCITT16.
Matrix. Three different polynomials are available: CCITT802.3, CASTAGNOLI and CCITT16.
23.2
Embedded Characteristics
32-bit cyclic redundancy check automatic calculation
CRC calculation between two addresses of the memory
23.3
CRCCU Block Diagram
Figure 23-1. Block Diagram
AHB-Layer
Context FSM
AHB Interface
Host
Interface
Interface
Atmel
APB Bus
APB Bus
AHB SRAM
Data Register
Addr Register
HRDATA
HTRANS
HSIZE
HSIZE
CRC Register
Flash
External
Bus Interface
Bus Interface