Datasheet

907
32072H–AVR32–10/2012
AT32UC3A3
33.5.7 Key Word n Register
Name:
KEYWnR
Access Type: Write-only
Offset: 0x20 +(n-1)*0x04
Reset Value: 0x00000000
• KEYWn[31:0]: Key Word n
Writing the 128-bit/192-bit/256-bit cryptographic key used for encryption/decryption in the four/six/eight 32-bit Key Word
registers.
KEYW1 corresponds to the first word of the key and respectively KEYW4/KEYW6/KEYW8 to the last one.
This field always read as zero to prevent the key from being read by another application.
31 30 29 28 27 26 25 24
KEYWn[31:24]
23 22 21 20 19 18 17 16
KEYWn[23:16]
15 14 13 12 11 10 9 8
KEYWn[15:8]
76543210
KEYWn[7:0]