HCS12 datasheet(286/452 Pages) FREESCALE

286 / 452 page

Instruction Glossary

S12CPUV2 Reference Manual, Rev. 4.0

286

Freescale Semiconductor

Operation:

(A) – (M)

⇒ A

Description:

Subtracts the content of memory location M from the content of accumulator

A, and places the result in A. For subtraction instructions, the C status bit

represents a borrow.

SUBA

Subtract A

SUBA

CCR Details:

HIN

––––

∆∆∆∆

N: Set if MSB of result is set; cleared otherwise

Z: Set if result is $00; cleared otherwise

V: A7

• M7 • R7 + A7 • M7 • R7

Set if a two’s complement overflow resulted from the operation;

cleared otherwise

C: A7

• M7 + M7 • R7 + R7 • A7

Set if the value of the content of memory is larger than the value of

the accumulator; cleared otherwise

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

SUBA #opr8i

SUBA opr8a

SUBA opr16a

SUBA oprx0_xysp

SUBA oprx9,xysp

SUBA oprx16,xysp

SUBA [D,xysp]

SUBA [oprx16,xysp]

IMM

DIR

EXT

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

80 ii

90 dd

B0 hh ll

A0 xb

A0 xb ff

A0 xb ee ff

A0 xb

A0 xb ee ff

rPf

rPO

rPf

rPO

frPP

fIfrPf

fIPrPf

rfP

rOP

rfP

rPO

frPP

fIfrfP

fIPrfP

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