ST STM32F40 Series User Manual

RM0090 Cryptographic processor (CRYP)
Doc ID 018909 Rev 4 586/1422
20.6.10 CRYP key registers (CRYP_K0...3(L/R)R)
Address offset: 0x20 to 0x3C
Reset value: 0x0000 0000
These registers contain the cryptographic keys.
In the TDES mode, keys are 64-bit binary values (number from left to right, that is the
leftmost bit is bit 1), named K1, K2 and K3 (K0 is not used), each key consists of 56
information bits and 8 parity bits. The parity bits are reserved for error detection purposes
and are not used by the current block. Thus, bits 8, 16, 24, 32, 40, 48, 56 and 64 of each 64-
bit key value Kx[1:64] are not used.
In the AES mode, the key is considered as a single 128-, 192- or 256-bit long bit sequence,
k
0
k
1
k
2
...k
127/191/255
(k
0
being the leftmost bit). The AES key is entered into the registers as
follows:
● for AES-128: k
0
..k
127
corresponds to b
127
..b
0
(b
255
..b
128
are not used),
● for AES-192: k
0
..k
191
corresponds to b
191
..b
0
(b
255
..b
192
are not used),
● for AES-256: k
0
..k
255
corresponds to b
255
..b
0
.
In any case b
0
is the rightmost bit.
CRYP_K0LR (address offset: 0x20)
CRYP_K0RR (address offset: 0x24)
CRYP_K1LR (address offset: 0x28)
Bit 0 INMIS: Input FIFO service masked interrupt status
Gives the interrupt state after masking of the input FIFO service interrupt.
0: Interrupt not pending
1: Interrupt pending when CRYPEN = 1
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
b255 b254 b253 b252 b251 b250 b249 b248 b247 b246 b245 b244 b243 b242 b241 b240
wwwwwwwwwwwwwwww
1514131211109876543210
b239 b238 b237 b236 b235 b234 b233 b232 b231 b230 b229 b228 b227 b226 b225 b224
wwwwwwwwwwwwwwww
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
b223 b222 b221 b220 b219 b218 b217 b216 b215 b214 b213 b212 b211 b210 b209 b208
wwwwwwwwwwwwwwww
1514131211109876543210
b207 b206 b205 b204 b203 b202 b201 b200 b199 b198 b197 b196 b195 b194 b193 b192
wwwwwwwwwwwwwwww
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
k1.1
b191
k1.2
b190
k1.3
b189
k1.4
b188
k1.5
b187
k1.6
b186
k1.7
b185
k1.8
b184
k1.9
b183
k1.10
b182
k1.11
b181
k1.12
b180
k1.13
b179
k1.14
b178
k1.15
b177
k1.16
b176
wwwwwwwwwwwwwwww

ST STM32F40 Series Specifications

General

Brand	ST
Model	STM32F40 Series
Category	Microcontrollers
Language	English