HCS12 datasheet(299/452 Pages) FREESCALE

tên linh kiện	HCS12

Giải thích chi tiết về linh kiện	HCS12 Microcontrollers

PDF	452 Pages

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Glossary

S12CPUV2 Reference Manual, Rev. 4.0

Freescale Semiconductor

299

Operation:

(M) – $00

Description:

Subtracts $00 from the content of memory location M and sets the condition

codes accordingly.

The subtraction is accomplished internally without modifying M.

The TST instruction provides limited information when testing unsigned

values. Since no unsigned value is less than zero, BLO and BLS have no

utility following TST. While BHI can be used after TST, it performs the same

function as BNE, which is preferred. After testing signed values, all signed

branches are available.

TST

Test Memory

TST

CCR Details:

HIN

––––

∆∆

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

Z: Set if result is $00; cleared otherwise

V: 0; cleared

C: 0; cleared

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

TST opr16a

TST oprx0_xysp

TST oprx9,xysp

TST oprx16,xysp

TST [D,xysp]

TST [oprx16,xysp]

EXT

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

F7 hh ll

E7 xb

E7 xb ff

E7 xb ee ff

E7 xb

E7 xb ee ff

rPO

rPf

rPO

frPP

fIfrPf

fIPrPf

rOP

rfP

rPO

frPP

fIfrfP

fIPrfP

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