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CM71-00105-1E FUJITSU MICROELECTRONICS LIMITED 89
FR81 Family
CHAPTER 6 INSTRUCTION OVERVIEW
6.2
TYPE-H
It has 12bit OP code (OP) and 32bit immediate data field (i32), register designated field (Ri). It has
48-bit length and is applied only for LDI:32 Instruction.
TYPE-I
It has 12-bit OP Code (OP) and 20-bit address designated filed (rel20). These are the instruction
formats that have been added to FR81 Family CPU.
TYPE-J
It has 12-bit OP Code (OP), register designated fields (Rj/FRi/cc) and 16-bit address designated
fields (u16/rel16). These are the instruction formats that have been added to FR81 Family CPU.
MSB LSB
(n+0) OP Ri
(n+2) i32 (Upper}
(n+4) i32 (Lower)
MSB LSB
(n+0) OP rel20
(n+2) rel20
MSB LSB
(n+0) OP Ri/FRi/cc
(n+2) u16/rel16