Maxim Integrated MAXQ7666 - Manual (Page 355)

MAXQ7665/MAXQ7666 User’s Guide
14-18
NEG Negate Accumulator
Description: Performs a negation (2'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 MAXQ7665/MAXQ7666 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.
1000 1010 1001 1010
f010 1010 ssss ssss
Maxim Integrated