MB91110 查看數據表（PDF） - Fujitsu

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MB91110

32-Bit RISC Microcontroller

Fujitsu 

MB91110 Series

2. Registers

There are two types of multi-purpose registers in the FR family. One is a dedicated purpose register that exists

within the CPU and the other is a multi-purpose register that exists in the memory.

• Dedicated Registers

Program Counter (PC)

: 32-bit length; indicates instruction storage position.

Program Status (PS)

: 32-bit length; stores register pointers and condition codes.

Table Base Register (TBR) : Holds the starting address of the vector table to be used for Exception, In-

terruption and Trapping (EIT) .

Return Pointer (RP)

: Holds the address to which you will return to from the sub-routine.

System Stuck Pointer (SSP) : Indicates the systems stuck position.

User Stuck Pointer (USP) : Indicates the user’s stuck position.

Multiplication and Division : 32-bit length; These are the registers for multiplication and division.

Results Resister (MDH/MDL)

32 bit

PC

PS

TBR

RP

SSP

USP

MDH

MDL

Program Counter

Program Status

Table Base Register

Return Pointer

System Stuck Pointer

User Stuck Pointer

Multiplication and Division

Results Resister

Initial values

XXXX XXXXH (Undecided)

000F FC00H

XXXX XXXXH (Undecided)

0000 0000H

XXXX XXXXH (Undecided)

XXXX XXXXH (Undecided)

XXXX XXXXH (Undecided)

• Program Status (PS)

PS is the register that holds the program status and is classified into three categories, namely, Condition Code

Register (CCR) , System Condition Code Register (SCR) and Interruption Level Master Register (ILM) .

31 to 21 20 19 18 17 16 15 to 1110 9 8 7 6 5 4 3 2 1 0

PS  ILM4 ILM3 ILM2 ILM1 ILM0  D1 D0 T   S I N Z V C

ILM

SCR

CCR

18

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