Fujitsu MB91401 データシート

31

■

■

■

■

Registers R0 to R15 are general-purpose registers. The registers are used as the accumulator and memory
access pointers for CPU operations.

Of these 16 registers, the registers listed below are intended for special applications, for which some instructions
are enhanced.

R13: Virtual accumulator

R14: frame pointer

R15:Stack pointer

The initial values of R0 to R14 after a reset are indeterminate. R15 is initialized to 00000000

H

 (SSP value).

0000 0000

H

AC

FP

R0

R1

R12

R13

R14

R15

SP

XXXX XXXX

H

XXXX XXXX

H

32 bits

Initial Value: