Datasheet

57.5.14 AES GCM Authentication Tag Word Register x
Name: AES_TAGRx
Offset: 0x88 + x*0x04 [x=0..3]
Reset: 0x00000000
Property: Read-only
Bit 31 30 29 28 27 26 25 24
TAG[31:24]
Access
R R R R R R R R
Reset 0 0 0 0 0 0 0 0
Bit 23 22 21 20 19 18 17 16
TAG[23:16]
Access
R R R R R R R R
Reset 0 0 0 0 0 0 0 0
Bit 15 14 13 12 11 10 9 8
TAG[15:8]
Access
R R R R R R R R
Reset 0 0 0 0 0 0 0 0
Bit 7 6 5 4 3 2 1 0
TAG[7:0]
Access
R R R R R R R R
Reset 0 0 0 0 0 0 0 0
Bits 31:0 – TAG[31:0] GCM Authentication T
ag x
The four 32-bit Tag registers contain the final 128-bit GCM Authentication tag (T) when GCM processing is complete.
TAG0 corresponds to the first word, TAG3 to the last word.
SAM E70/S70/V70/V71 Family
Advanced Encryption Standard (AES)
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2019 Microchip Technology Inc.
Datasheet
DS60001527D-page 1815