PKA_CR register
| EN | Peripheral enable. 0 : Disable PKA. 1 : Enable PKA. |
| START | Start the operation 0: No operation 1: Writing ‘1’ to this bit starts the operation which is selected by MODE[5:0], using the operands and data already written to the PKA RAM. This bit is always read as ‘0’. Nota: START is ignored if PKA is busy. |
| SECLVL | Security enable. 0: No side channel countermeasure 1: Square and Multiply always / Double and Add always |
| MODE | PKA operation code 000000 : Compute Montgomery parameter and modular exponentiation 000001 : Compute Montgomery parameter 000010 : Compute modular exponentiation only (Montgomery parameter should be loaded) 100000 : Compute Montgomery parameter and compute ECC kP operation 100010 : Compute the ECC kP primitive only (Montgomery parameter should be loaded) 100100 : ECDSA sign 100110 : ECDSA Verification 101000 : Point Check 000111 : RSA CRT exponentiation 001000 : Modular inversion 001001 : Arithmetic addition 001010 : Arithmetic Subtraction 001011 : Arithmetic multiplication 001100 : Comparison 001101 : Modular Reduction 001110 : Modular Addition 001111 : Modular Subtraction 010000 : Montgomery Multiplication |
| PROCENDIE | End of operation interrupt enable 0: Interrupt is disabled. 1: An interrupt is generated when PROCENDF (PKA_SR[17]) is set. |
| RAMERRIE | RAM error interrupt enable 0: Interrupt is disabled. 1: An interrupt is generated when RAMERRF (PKA_SR[19]) is set. |
| ADDRERRIE | Address error interrupt enable 0: Interrupt is disabled. 1: An interrupt is generated when ADDRERRF (PKA_SR[20]) is set. |
| FAULTFSMIE | Fault FSM interrupt enable 0: Interrupt is disabled. 1: An interrupt is generated when FAULTFSMF (PKA_SR[22]) is set. |
| FAULTERRORCODEIE | Fault error code interrupt enable 0: Interrupt is disabled. 1: An interrupt is generated when FAULTERRORCODEF (PKA_SR[23]) is set. |