HCS12 datasheet(153/452 Pages) FREESCALE

153 / 452 page

S12CPUV2 Reference Manual, Rev. 4.0

Freescale Semiconductor

153

Operation:

(B) – (M)

Description:

Compares the content of accumulator B to the content of memory location

M and sets the condition codes, which may then be used for arithmetic and

logical conditional branching. The contents of B and location M are not

changed.

CMPB

Compare B

CMPB

CCR Details:

HIN

––––

∆∆∆∆

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

Z: Set if result is $00; cleared otherwise

V: B7

• M7 • R7 + B7 • M7 • R7

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

cleared otherwise

C: B7

• M7 + M7 • R7 + R7 • B7

Set if there was a borrow from the MSB of the result; cleared

otherwise

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

CMPB #opr8i

CMPB opr8a

CMPB opr16a

CMPB oprx0_xysp

CMPB oprx9,xysp

CMPB oprx16,xysp

CMPB [D,xysp]

CMPB [oprx16,xysp]

IMM

DIR

EXT

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

C1 ii

D1 dd

F1 hh ll

E1 xb

E1 xb ff

E1 xb ee ff

E1 xb

E1 xb ee ff

rPf

rPO

rPf

rPO

frPP

fIfrPf

fIPrPf

rfP

rOP

rfP

rPO

frPP

fIfrfP

fIPrfP

HCS12 Datasheet(PDF) 153 Page - Freescale Semiconductor, Inc

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