Datasheet

DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0Rreserved28:25
Counter with CBC-MAC (CCM)
Defines M which indicates the length of the authentication field for CCM
operations; the authentication field length equals two times the sum of
CCM-M plus one.
Note: The AES Engine always returns a 128-bit authentication field,
of which the M least significant bytes are valid. All values are
supported.
0RWCCM_M24:22
L Value
Defines L, which indicates the width of the length field for CCM
operations; the length field in bytes equals the value of CMM-L plus
one. Supported values for L are:
DescriptionValue
width = 00x0
width = 20x1
reserved0x2
width = 40x3
reserved0x4 - 0x6
width = 80x7
0RWCCM_L21:19
AES-CCM Mode Enable
DescriptionValue
AES-CCM mode is not enabled.0
AES-CCM mode enabled. This is a combined mode, using AES
for both authentication and encryption. No additional mode
selection is required.
1
0RWCCM18
AES-GCM Mode Enable
This is a combined mode, using the Galois field-multiplier GF(2
128
) for
authentication and AES-CTR mode for encryption; the bits specify the
GCM mode.
DescriptionValue
No operation0x0
GHASH with H loaded and Y0-encrypted forced to zero0x1
GHASH with H loaded and Y0-encrypted calculated internally0x2
Autonomous GHASH (both H and Y0-encrypted calculated
internally)
0x3
0RWGCM17:16
December 13, 20131014
Texas Instruments-Advance Information
Advance Encryption Standard Accelerator (AES)