Datasheet

42.8.8 Keyword
Name: KEYWORD
Offset: 0x0C + n*0x04 [n=0..7]
Reset: 0x00000000
Property: PAC Write-Protection
Bit 31 30 29 28 27 26 25 24
KEYWORD[31:24]
Access
W W W W W W W W
Reset 0 0 0 0 0 0 0 0
Bit 23 22 21 20 19 18 17 16
KEYWORD[23:16]
Access
W W W W W W W W
Reset 0 0 0 0 0 0 0 0
Bit 15 14 13 12 11 10 9 8
KEYWORD[15:8]
Access
W W W W W W W W
Reset 0 0 0 0 0 0 0 0
Bit 7 6 5 4 3 2 1 0
KEYWORD[7:0]
Access
W W W W W W W W
Reset 0 0 0 0 0 0 0 0
Bits 31:0 – KEYWORD[31:0] Key Word Value
The four/six/eight 32-bit Key Word registers set the 128-bit/192-bit/256-bit cryptographic key used for
encryption/decryption. KEYWORD0.KEYWORD corresponds to the first word of the key and KEYWORD3/
KEYWORD5/KEYWORD7.KEYWORD to the last one.
Note: By setting the XORKEY bit of CTRLA register, keyword will update with the resulting XOR value of
user keyword and previous keyword content.
SAM D5x/E5x Family Data Sheet
AES – Advanced Encryption Standard
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 1436