Datasheet

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.
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
Atmel
APB Bus
AHB SRAM
Data Register
Addr Register
HRDATA
HTRANS
HSIZE
CRC Register
Flash
External
Bus Interface