OPCODE

Address offset: 0x80

Operation code to be executed by the PKA engine.

Writing to this register triggers the PKA operation.


Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ID				I	I	I	I	I	H	H	H	G	F	F	F	F	F	E	D	D	D	D	D	C	B	B	B	B	B	A	A	A	A	A	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
ID	R/W	Field	Value ID	Value								Description
A	RW	TAG										Holds the operation tag or the operand C virtual register index.
B	RW	REG_R										Result register virtual register index.
C	RW	DISCARD_R										This field controls the interpretation of REG_R.
			Register	0x0								REG_R is intepreted as a register index.
			Discard	0x1								Result is discarded.
D	RW	REG_B										Operand B virtual register index.
E	RW	CONST_B										This field controls the interpretation of REG_B.
			Register	0x0								REG_B is intepreted as a register index.
			Constant	0x1								REG_B is intepreted as a constant.
F	RW	REG_A										Operand A virtual register index.
G	RW	CONST_A										This field controls the interpretation of REG_A.
			Register	0x0								REG_A is intepreted as a register index.
			Constant	0x1								REG_A is intepreted as a constant.
H	RW	LEN										The length of the operands. This value serves as an PKA length register index. E.g.: if LEN field value is set to 0, PKA_L[0] holds the size of the operands.
I	RW	OPCODE										Operation code to be executed by the PKA engine
			Terminate	0x0								Terminate operation
			AddInc	0x4								Add or Increment
			SubDecNeg	0x5								Subtract, Decrement, or Negate
			ModAddInc	0x6								Modular Add or Modular Increment
			ModSubDecNeg	0x7								Modular Subtract, Modular Decrement, or Modular Negate
			ANDTST0CLR0	0x8								Perform AND, test, or clear
			ORCOPYSET0	0x9								Perform OR, copy, or set bits
			XORFLP0INVCMP	0xA								Perform XOR, flip bits, invert, or compare
			SHR0	0xC								Shift right 0 operation
			SHR1	0xD								Shift right 1 operation
			SHL0	0xE								Shift left 0 operation
			SHL1	0xF								Shift left 1 operation
			MulLow	0x10								Multiply low operation
			ModMul	0x11								Modular multiply operation
			ModMulN	0x12								Modular multiply N operation
			ModExp	0x13								Modular exponentiation operation
			Division	0x14								Division operation
			ModInv	0x15								Modular inversion operation
			ModDiv	0x16								Modular division operation
			MulHigh	0x17								Multiply high operation
			ModMLAC	0x18								Modular multiplication acceleration
			ModMLACNR	0x19								Modular multiplication acceleration where final reduction is omitted
			Reduction	0x1B								Reduction operation