Public key accelerator (PKA) RM0453
718/1454 RM0453 Rev 2
24.7 PKA registers
24.7.1 PKA control register (PKA_CR)
Address offset: 0x00
Reset value: 0x0000 0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
ADDR
ERRIE
RAM
ERRIE
Res.
PROC
ENDIE
Res.
rw rw rw
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Res. Res. MODE[5:0] Res. Res. Res. Res. Res. Res. START EN
rw rw rw rw rw rw rw rw
Bits 31:21 Reserved, must be kept at reset value.
Bit 20 ADDRERRIE: Address error interrupt enable
0: No interrupt is generated when ADDRERRF flag is set in PKA_SR.
1: An interrupt is generated when ADDRERRF flag is set in PKA_SR.
Bit 19 RAMERRIE: RAM error interrupt enable
0: No interrupt is generated when RAMERRF flag is set in PKA_SR.
1: An interrupt is generated when RAMERRF flag is set in PKA_SR.
Bit 18 Reserved, must be kept at reset value.
Bit 17 PROCENDIE: End of operation interrupt enable
0: No interrupt is generated when PROCENDF flag is set in PKA_SR.
1: An interrupt is generated when PROCENDF flag is set in PKA_SR.
Bits 16:14 Reserved, must be kept at reset value.
Bits 13:8 MODE[5:0]: PKA operation code
000000: Montgomery parameter computation then modular exponentiation
000001: Montgomery parameter computation only
000010: Modular exponentiation only (Montgomery parameter must be loaded first)
100000: Montgomery parameter computation then ECC scalar multiplication
100010: ECC scalar multiplication only (Montgomery parameter must be loaded first)
100100: ECDSA sign
100110: ECDSA verification
101000: Point on elliptic curve Fp check
000111: RSA CRT exponentiation
001000: Modular inversion
001001: Arithmetic addition
001010: Arithmetic subtraction
001011: Arithmetic multiplication
001100: Arithmetic comparison
001101: Modular reduction
001110: Modular addition
001111: Modular subtraction
010000: Montgomery multiplication
Others: Reserved
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