MaximIntegrated 20-3
MAX31782 User’s Guide
ADD/ADDCsrc
Add/AddwithCarry
Description:
The ADD instruction sums the active accumulator (Acc or A[AP]) and the specified src data and
stores the result back to the active accumulator . The ADDC instruction additionally includes the
Carry (C) Status Flag in the sum- mation . For the complete list of src specifiers, reference the MOVE
instruction . Because the source field is limited to 8 bits, the PFX[n] register is used to supply the
high-byte of data for 16 bit sources .
StatusFlags:
C, S, Z, OV
ADDOperation:
Acc
←
Acc + src
Encoding:
15
0
f100
1010
ssss
ssss
Example(s):
; Acc = 2345h for each example
ADD A[3]
; A[3]=FF0Fh
;
→
Acc =2254h,C=1, Z=0, S=0, OV=0
ADD #0C0h
;
→
Acc =2405h,C=0, Z=0, S=0, OV=0
ADD A[4]
; A[4]=C000h
;
→
Acc = E345h, C=0, Z=0, S=1, OV=0
ADD A[5]
; A[5]=6789h
;
→
Acc = 8ACEh, C=0, Z=0, S=1, OV=1
ADDCOperation:
Acc
←
Acc + C + src
Encoding:
15
0
f110
1010
ssss
ssss
Example(s):
; Acc = 2345h for each example
ADDC A[3]
; A[3] = DCBAh, C=1
;
→
Acc = 0000h, C=1, Z=1, S=0, OV=0
ADDC @DP[0]--
; @DP[0] = 00EEh, C=1
;
→
Acc = 2434h, C=0, Z=0, S=0, OV=0
SpecialNotes:
The active accumulator (Acc) is not allowed as the src for these operations .
