Maxim-integrated MAXQ7667 Manual do Utilizador descarregar pdf (Página 332)

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MAXQ7667 User’s Guide

NEG Negate Accumulator

Description:

Performs a negation (two’s complement) of the active accumulator and returns the result back to the active accumulator.

Status Flags: S, Z

Operation: Acc ← ~Acc + 1

Encoding: 15 0

Example(s): ; Acc = FEEDh, S=1, Z=0

NEG ; Acc = 0113h, S=0, Z=0

OR src Logical OR

Description:

Performs a logical-OR between the active accumulator (Acc or A[AP]) and the specified src data. For the complete

list of src specifiers, reference the MOVE instruction. The MAXQ7667 may use the PFX[n] register to supply the high

byte of data for 8-bit sources.

Status Flags: S, Z

Operation: Acc ← Acc OR src

Encoding: 15 0

Example(s): ; Acc = 2345h for each example

OR A[3] ; A[3]= 0F0Fh

→ Acc = 2F4Fh

OR #1133h ; MOVE PFX[0], #11h (smart-prefixing)

; OR #33h

→ Acc = 3377h

Special Notes: The active accumulator (Acc) is not allowed as the src for this operation.

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