Cryp Initialization Vector Registers (Cryp_Iv0 - ST STM32F207 Series Reference Manual

RM0033
CRYP_K3RR (address offset: 0x3C)
31 30 29
k3.33 k3.34 k3.35 k3.36
b31 b30 b29
w w w
15 14 13
k3.49 k3.50 k3.51 k3.52
b15 b14 b13
w w w
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
TDES Cipher block chaining (DES/TDES-CBC) mode on page
block chaining (AES-CBC) mode on page 517
mode on page
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)
31 30 29
IV0 IV1 IV2
rw rw rw
15 14 13
IV16 IV17 IV18 IV19
rw rw rw
CRYP_IV0RR (address offset: 0x44)
31 30 29
IV32 IV33 IV34 IV35
rw rw rw
15 14 13
IV48 IV49 IV50 IV51
rw rw rw
28 27 26 25
k3.37 k3.38 k3.39
b28 b27 b26 b25
w w w w
12 11 10 9
k3.53 k3.54 k3.55
b12 b11 b10 b9
w w w w
519.
28 27 26 25
IV3 IV4 IV5 IV6
rw rw rw rw
12 11 10 9
IV20 IV21 IV22
rw rw rw rw
28 27 26 25
IV36 IV37 IV38
rw rw rw rw
12 11 10 9
IV52 IV53 IV54
rw rw rw rw
24 23 22
k3.40 k3.41 k3.42 k3.43
b24 b23 b22
w w w
8 7 6
k3.56 k3.57 k3.58 k3.59
b8 b7 b6
w w w
and Section : AES counter mode (AES-CTR)
24 23 22
IV7 IV8 IV9
rw rw rw
8 7 6
IV23 IV24 IV25
rw rw rw
24 23 22
IV39 IV40 IV41
rw rw rw
8 7 6
IV55 IV56 IV57
rw rw rw
RM0033 Rev 9
Cryptographic processor (CRYP)
21 20 19 18
k3.44 k3.45 k3.46
b21 b20 b19 b18
w w w w
5 4 3 2
k3.60 k3.61 k3.62
b5 b4 b3 b2
w w w w
Section : DES and
513, Section : AES Cipher
21 20 19 18
IV10 IV11 IV12 IV13
rw rw rw rw
5 4 3 2
IV26 IV27 IV28 IV29
rw rw rw rw
21 20 19 18
IV42 IV43 IV44 IV45
rw rw rw rw
5 4 3 2
IV58 IV59 IV60 IV61
rw rw rw rw
17 16
k3.47 k3.48
b17 b16
w w
1 0
k3.63 k3.64
b1 b0
w w
17 16
IV14 IV15
rw rw
1 0
IV30 IV31
rw rw
17 16
IV46 IV47
rw rw
1 0
IV62 IV63
rw rw
541/1381
543