PK.COMMAND

RW

OPEADDR

This field defines the operation to be performed.

See documentation for more details.

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FIELDF

0: Field is GF(p) 1: Field is GF(2**m)

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OPBYTESM1

This field defines the size (= number of bytes minus one) of the operands for the current operation.

Possible values are limited by the maximum supported operand size. Examples: - 0x014 - ECC on curve K-163 - 0x01F - ECC on curve P-256 - 0x02F - ECC on curve P-384 - 0x033 - ECC on curve K-409 - 0x041 - ECC on curve P-521 - 0x07F - 1024-bit RSA - 0x09F - 1280-bit RSA - 0x1FF - 4096-bit RSA - 0x3FF - 8192-bit RSA

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RANDMOD

Enable randomization of modulus (counter-measure).

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SELCURVE

Enable accelerator for specific curve modulus:

This field has no effect when the optional acceleration hardware is not included.

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RANDKE

Enable randomization of exponent/scalar (counter-measure).

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RANDPROJ

Enable randomization of projective coordinates (counter-measure).

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EDWARDS

Enable Edwards curve.

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SWAPBYTES

Swap the bytes on AHB interface:

This bit must be programmed before writing/reading any data in data memory.

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FLAGA

Flag A.

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FLAGB

Flag B.

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CALCR2

This bit indicates if the IP has to calculate R**2 mod N for the next operation.

This bit must be set to 1 when a new prime number has been programmed. This bit is used for primitive operations and ignored for the other operations.