Maxim Integrated MAX31782 User Manual
Page 189
MaximIntegrated 20-6
MAX31782 User’s Guide
Revision 0; 8/11
CMPsrc
CompareAccumulator
Description:
Compare for equality between the active accumulator and the least significant byte of the speci-
fied src . Because the source is limited to 8 bits, the PFX[n] register is used to supply the high-byte
of data for 16 bit sources .
StatusFlags:
E
Operation:
Acc = src: E
← 1
Acc <> src: E
← 0
Encoding:
15
0
f111
1000
ssss
ssss
Example(s):
CMP #45h
; Acc = 0145h, E=0
CMP #145h
; PFX[0] register used
; MOVE PFX[0], #01h (smart-prefixing)
; CMP #45h E=1
CPL
ComplementAcc
Description:
Performs a logical bitwise complement (1’s complement) on the active accumulator (Acc or A[AP])
and returns the result to the active accumulator .
StatusFlags:
S, Z
Operation:
Acc
← ~Acc
Encoding:
15
0
1000
1010
0001
1010
Example(s):
; Acc = FFFFh, S=1, Z=0
CPL
; Acc
← 0000h, S=0, Z=1
; Acc = 0990h, S=0, Z=0
CPL
; Acc
← F66Fh, S=1, Z=0