Fujitsu MB90335 Series Hardware Manual page 563

APPENDIX B Instructions
B.3 Direct Addressing
●
Physical direct branch addressing (addr24)
Specify an offset explicitly for the branch destination address. The size of the offset is 24 bits. Physical
direct branch addressing is used for unconditional branch, subroutine call, or software interrupt instruction.
JMPP 333B20H (This instruction causes an unconditional branch by direct branch 24-bit
Before execution
After execution
●
I/O direct addressing (io)
Specify an 8-bit offset explicitly for the memory address in an operand. The I/O address space in the
physical address space from 000000
and direct page register (DPR). A bank select prefix for bank addressing is invalid if specified before an
instruction using I/O direct addressing.
MOVW A, I:0C0H (This instruction reads data by I/O direct addressing and stores it in A.)
Before execution
After execution
Note : "I:" is Addressing Specifier that shows the I/O Direct Addressing.
542
Figure B.3-4 Example of Direct Branch Addressing (addr24)
addressing.)
PC 3 C 2 0 PCB 4 F
PC 3 B 2 0 PCB 3 3
Figure B.3-5 Example of I/O Direct Addressing (io)
A 0 7 1 6
A 2 5 3 4 F F E E
FUJITSU MICROELECTRONICS LIMITED
Memory space
333B20
H
4F3C20
H
4F3C21
H
4F3C22
H
4F3C23
H
to 0000FF is accessed regardless of the data bank register (DTB)
H H
2 5 3 4
0000C0
0000C1
MB90335 Series
Next instruction
6 3 JMPP 333B20
2 0
3 B
3 3
Memory space
E E
H
F F
H
CM44-10137-6E
H