MB91107 View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB91107

32-bit RISC Microcontroller

Fujitsu 

MB91107/108

s GENERAL-PURPOSE REGISTERS

R0 to R15 are general-purpose registers embedded on the CPU. These registers functions as an accumulator

and a memory access pointer.

32 bit

Initial value

R0

XXXX XXXXH

R1

:

:

:

:

:

:

R12

:

R13

AC

:

R14

FP

XXXX XXXXH

R15

SP

0000 0000H

Of the above 16 registers, following registers have special functions. To support the special functions, part of

the instruction set has been sophisticated to have enhanced functions.

R13: Virtual accumulator (AC)

R14: Frame pointer (FP)

R15: Stack pointer (SP)

Upon reset, values in R0 to R14 are not fixed. Value in R15 is initialized to be 0000 0000H (SSP value).

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