ARM Cortex-M3 Uživatelský manuál stáhnout pdf (Strana 11)

11

Program Status Register



One Status Register consisting of



APSR

-

Application Program Status Register

–

ALU flags



IPSR

-

Interrupt Program Status Register

–

Interrupt/Exception No.



EPSR

-

Execution Program Status Register



IT field

–

If/Then block information



ICI field

–

Interruptible

-

Continuable Instruction information



xPSR



Composite of the 3 PSRs



Stored on the stack on exception entry

IT/ICI

IT

27

31

N Z C V Q

28

7

ISR Number

16

23

15

0

24

25

26

10

T

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 40 41

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