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CM71-00105-1E FUJITSU MICROELECTRONICS LIMITED 17
CHAPTER 3 PROGRAMMING MODEL
3.2
3.2 General-purpose Registers
General-purpose registers are used for storing results of various calculations, as well
as information about addresses to be used as pointers for memory access.
3.2.1 Configuration of General-purpose Registers
General-purpose registers has sixteen each 32 bits in length. General-purpose registers have names R0 to
R15.
In case of general instructions, the general-purpose registers can use without any distinction. In some
instructions, three registers namely R13, R14 and R15 have special usages.
Figure 3.2-1 shows the configuration and initial values of general-purpose registers.
Figure 3.2-1 Configuration and initial values of general-purpose registers
R0 to R14 are not initialized as a result of reset. R15 is initialized 0000 0000
H
as a result of reset.
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
FP
SP
AC
32 bits
[Initial value]