MB91107 Просмотр технического описания (PDF) - Fujitsu

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производитель

MB91107

32-bit RISC Microcontroller

Fujitsu 

MB91107/108

2. Registers

The FR family has two types of registers; dedicated registers embedded on the CPU and general-purpose

registers on memory.

•Dedicated registers

Program counter (PC)

: 32-bit length, indicates the location of the instruction to be executed.

Program status (PS)

: 32-bit length, register for storing register pointer or condition codes.

Table base register (TBR)

: Holds top address of vector table used in EIT (Exceptional/Interrupt/

Trap processing.

Return pointer (RP)

: Holds address to resume operation after returning from a subroutine.

System stack pointer (SSP) : Indicates system stack space.

User's stack pointer (USP) : Indicates user’s stack space.

Multiplication/division result

register (MDH/MDL)

: 32-bit length, register for multiplication/division.

Program counter

32 bit

PC

Program status

PS

Table base register

TBR

Return pointer

RP

System stack pointer

SSP

User’s stack pointer

USP

Multiplication/division re-

sult register

MDH

MDL

32 bit

 ILM  SCR CCR

Initial value

XXXX XXXX Indeterminate

0 0 0F FC 0 0

XXXX XXXX Indeterminate

0000 0000

XXXX XXXX Indeterminate

XXXX XXXX Indeterminate

XXXX XXXX Indeterminate

•Program status (PS)

The PS register is for holding program status and consists of a condition code register (CCR), a system condition

code register (SCR) and a interrupt level mask register (ILM).

31 20 19 18 17 16

10 9 8 7 6 5 4 3 2 1 0

PS 

ILM4 to ILM0

 D1 D0 T   S I N Z V C

ILM

SCR

CCR

19

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