Filter
Top Products
FR81 Family
86 FUJITSU MICROELECTRONICS LIMITED CM71-00105-1E
CHAPTER 6 INSTRUCTION OVERVIEW
6.2
6.2.2 Addressing Formats
There are several methods for address specification when accessing memory in the memory space or I/O
register. Addressing format varies depending on Instruction.
@General-purpose Registers
It is Register Indirect Addressing. Address indicated by the content of the general-purpose register is
accessed.
@(R13, General-purpose Register)
Address where virtual accumulator (R13) and contents of general-purpose register are added is
accessed.
@(R14,Immediate Data)
Address where contents of Frame Pointer (R14) and immediate data are added is accessed.
Immediate data is specified in the multiples of data size (word, half word, byte).
@(R15, Immediate Data)
Address where contents of Stack Pointer (R15) and immediate data are added is accessed.
Immediate data is specified in the multiples of data size (word, half word, byte).
@R15+
Write access to the address indicated by the contents of Stack Pointer (R15) is made. 4 will be added
to the stack pointer (R15).
@-R15
Read access to the address which is deduction of 4 from the contents of Stack Pointer (R15) is made.
4 will be deducted from the Stack Pointer (R15).
@ Immediate Data
It is direct addressing. Address indicated by immediate data is accessed.
@R13+
Access to address indicated by the contents of virtual accumulator (R13) is made. Data size (Bytes)
will get added to virtual accumulator (R13).
@(BP, Immediate Data)
Address where the base pointer (BP) and immediate data are added is accessed. Immediate data is
specified in the multiples of data size (word, half word, byte).