Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 213)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 16-3

ADD/ADDC src Add/Add with Carry

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 summation. For the complete list of src specifiers, reference the MOVE

instruction. The PFX[n] register may be used to supply the high byte of data for 8-bit sources.

Status Flags:

C, S, Z, OV

ADD

Operation:

Acc ← Acc + src

Encoding:

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

ADDC

Operation:

Acc ← Acc + C + src

Encoding:

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

Special Notes:

The active accumulator (Acc) is not allowed as the src for these operations.

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Maxim-integrated MAXQ622 Manual do Utilizador Página 213