MB91110 查看數據表（PDF） - Fujitsu

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MB91110

32-Bit RISC Microcontroller

Fujitsu 

MB91110 Series

s MULTI-PURPOSE REGISTERS

The multi-purpose registers are CPU registers (R0 to R15) which are used as accumulators for various compu-

tations and memory access pointers (field that indicates the address) .

• Register bank configuration

32-bit

Initial value

R0

XXXX XXXXH

R1

R12

R13

AC (Accumulator)

R14

FP (Frame Pointer)

XXXX XXXXH

R15

SP (Stack Pointer)

0000 0000H

Special purposes are assumed for the following three registers out of the 16 registers. Thus, some instructions

are emphasized.

R13 : Virtual accumulator (AC)

R14 : Frame Pointer (FP)

R15 : Stack Pointer (SP)

Initial values for R0 to R14 on resetting are unspecified. The initial value of R15 will be 0000 0000H (SSP value) .

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