HCS12 datasheet(239/452 Pages) FREESCALE

239 / 452 page

Glossary

S12CPUV2 Reference Manual, Rev. 4.0

Freescale Semiconductor

239

Operation:

0 – (M) = (M) + 1

⇒ M

Description:

Replaces the content of memory location M with its two’s complement (the

value $80 is left unchanged).

NEG

Negate Memory

NEG

CCR Details:

HIN

––––

∆∆∆∆

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

Z: Set if result is $00; cleared otherwise.

V: R7

• R6 • R5 • R4 • R3 • R2 • R1 • R0

Set if there is a two’s complement overflow from the implied

subtraction from zero; cleared otherwise. Two’s complement

overflow occurs if and only if (M) = $80

C: R7

+ R6 + R5 + R4 + R3 + R2 + R1 + R0

Set if there is a borrow in the implied subtraction from zero; cleared

otherwise. Set in all cases except when (M) = $00.

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

NEG opr16a

NEG oprx0_xysp

NEG oprx9,xysp

NEG oprx16,xysp

NEG [D,xysp]

NEG [oprx16,xysp]

EXT

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

70 hh ll

60 xb

60 xb ff

60 xb ee ff

60 xb

60 xb ee ff

rPwO

rPw

rPwO

frPwP

fIfrPw

fIPrPw

rOPw

rPw

rPOw

frPPw

fIfrPw

fIPrPw

HCS12 Datasheet(PDF) 239 Page - Freescale Semiconductor, Inc

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