MB91110 Просмотр технического описания (PDF) - Fujitsu

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MB91110

32-Bit RISC Microcontroller

Fujitsu 

MB91110 Series

• Condition Code Register (CCR)

S flag : Specifies the stuck pointer to be used as R15.

I flag

: Controls permission and prohibition of user interruption requests.

N flag

: Indicates codes when the computation results are defined as integers that are expressed in

complements of 2.

Z flag : Indicates if arithmetic results were “0.”

V flag

:

Indicates when operands are used for computation and defined as integers expressed in com-

plements of 2, and indicates whether or not an overflow is generated as a result of the compu-

tation.

C flag

: Indicates whether carrying or borrowing is generated from the highest bit as a result of the com-

putation.

• System Condition Code Register (SCR)

T flag : Specifies whether or not the step- trace- trap will be valid.

• Interruption Level Mask Register (ILM)

ILM4 to ILM0 : Holds the interruption level mask values, and those values that are held by the ILM are used

for the level mask. Interruption requests can only be accepted when the interruption levels

handled within the interruption requests to be input into the CPU are stronger than the levels

shown by the ILM.

ILM4

0

ILM3

0

ILM2

0

ILM1

0

ILM0

0

Interruption level Strength

0

Strong

0

1

0

0

0

15

1

1

1

1

1

31

Weak

19

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