RM0033 Rev 9 541/1381
RM0033 Cryptographic processor (CRYP)
543
CRYP_K3RR (address offset: 0x3C)
Note: Write accesses to these registers are disregarded when the cryptographic processor is busy
(bit BUSY = 1 in the CRYP_SR register).
19.6.10 CRYP initialization vector registers (CRYP_IV0...1(L/R)R)
Address offset: 0x40 to 0x4C
Reset value: 0x0000 0000
The CRYP_IV0...1(L/R)R are the left-word and right-word registers for the initialization
vector (64 bits for DES/TDES and 128 bits for AES) and are used in the CBC (Cipher block
chaining) and Counter (CTR) modes. After each computation round of the TDES or AES
Core, the CRYP_IV0...1(L/R)R registers are updated as described in Section : DES and
TDES Cipher block chaining (DES/TDES-CBC) mode on page 513, Section : AES Cipher
block chaining (AES-CBC) mode on page 517 and Section : AES counter mode (AES-CTR)
mode on page 519.
IV0 is the leftmost bit whereas IV63 (DES, TDES) or IV127 (AES) are the rightmost bits of
the initialization vector. IV1(L/R)R is used only in the AES.
CRYP_IV0LR (address offset: 0x40)
CRYP_IV0RR (address offset: 0x44)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
k3.33
b31
k3.34
b30
k3.35
b29
k3.36
b28
k3.37
b27
k3.38
b26
k3.39
b25
k3.40
b24
k3.41
b23
k3.42
b22
k3.43
b21
k3.44
b20
k3.45
b19
k3.46
b18
k3.47
b17
k3.48
b16
wwwwwwwwwwwwwwww
1514131211109876543210
k3.49
b15
k3.50
b14
k3.51
b13
k3.52
b12
k3.53
b11
k3.54
b10
k3.55
b9
k3.56
b8
k3.57
b7
k3.58
b6
k3.59
b5
k3.60
b4
k3.61
b3
k3.62
b2
k3.63
b1
k3.64
b0
wwwwwwwwwwwwwwww
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
IV0 IV1 IV2 IV3 IV4 IV5 IV6 IV7 IV8 IV9 IV10 IV11 IV12 IV13 IV14 IV15
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
1514131211109876543210
IV16 IV17 IV18 IV19 IV20 IV21 IV22 IV23 IV24 IV25 IV26 IV27 IV28 IV29 IV30 IV31
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
IV32 IV33 IV34 IV35 IV36 IV37 IV38 IV39 IV40 IV41 IV42 IV43 IV44 IV45 IV46 IV47
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
1514131211109876543210
IV48 IV49 IV50 IV51 IV52 IV53 IV54 IV55 IV56 IV57 IV58 IV59 IV60 IV61 IV62 IV63
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
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