Filter
Top Products
CM71-00105-1E FUJITSU MICROELECTRONICS LIMITED 87
FR81 Family
CHAPTER 6 INSTRUCTION OVERVIEW
6.2
6.2.3 Instruction Formats
FR81 Family CPU Instructions are 16-bit in length. Bit configuration of Instructions varies depending on
configuration of operands of Instructions. Bit configuration of Instructions classified into groups is called
Instruction Formats.
There are 14 types of Instructions Formats TYPE-A through TYPE-N.
TYPE-A
It has 8-bit OP Code (OP) and two Register designated fields (Rj/Rs,Ri)
TYPE-B
It has 4-bit OP Code (OP) and 8-bit immediate data fields (i8/o8), register designated field (Ri)
TYPE-C
It has 8-bit OP Code (OP) and 4-bit immediate data fields (u4/m4/i4), register designated field (Ri)
TYPE-D
It has 8-bit OP Code (OP) and 8-bit immediate data field (u8) or address designated field (rel8/dir8).
In some instructions, it is 8-bit register list designated field (rlist).
MSB LSB
OP Rj/Rs Ri
MSB LSB
OP i8/o8 Ri
MSB LSB
OP u4/m4/i4 Ri
MSB LSB
OP u8/rel8/dir8/reglist