Maxim Integrated MAXQ Family - Manual (Page 215)

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MAXQ Family User’s Guide
XOR src Logical XOR
Description: Performs a logical-XOR between the active accumulator (Acc or A[AP]) and the specified src data. For the com-
plete list of src specifiers, reference the MOVE instruction. The MAXQ20 may use the PFX[n] register to supply the
high byte of data for 8-bit sources.
Status Flags: S, Z
Operation: Acc ← Acc XOR src
Encoding: 15 0
MAXQ10
Example(s):
; Acc = 23h
XOR A[2] ; A[2]=0Fh; Acc ← 2Ch
XOR #28h ; Acc ← 04h
MAXQ20
Example(s):
; Acc = 2345h
XOR A[2] ; A[2]=0F0Fh; Acc ← 2C4Ah
Special Notes: The active accumulator (Acc) is not allowed as the src for this operation.
XOR Acc. Logical XOR Carry Flag with Accumulator Bit
Description: Performs a logical-XOR between the Carry (C) status flag and a specified bit of the active accumulator (Acc.)
and returns the result to the Carry.
Status Flags: C
Operation: C ← C XOR Acc.
Encoding: 15 0
MAXQ10
Example(s):
; Acc = 45h, C=1 at start
XOR Acc.1 ; Acc.1=0 → C=1
XOR Acc.2 ; Acc.2=1 → C=0
MAXQ20
Example(s):
; Acc = 2345h, C=1 at start
XOR Acc.1 ; Acc.1=0 → C=1
XOR Acc.2 ; Acc.2=1 → C=0
Special Notes: For the MAXQ10, the accumulator width is only 8 bits. Thus, only bit index encoding ('bbbb') for bits 0 ('0000')
through 7 ('0111') is supported.
f011 1010 ssss ssss
1011 1010 bbbb 1010
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