Fujitsu MB90335 Series Hardware Manual page 565

APPENDIX B Instructions
B.3 Direct Addressing
●
I/O direct bit addressing (io:bp)
Specify bits in physical addresses 000000
where the larger number indicates the most significant bit (MSB) and the lower number indicates the least
significant bit (LSB).
SETB I:0C1H:0 (This instruction sets bits by I/O direct bit addressing.)
Note : "I:" is Addressing Specifier that shows the I/O Direct Addressing.
●
Abbreviated direct bit addressing (dir:bp)
Specify the eight low-order bits of a memory address explicitly in an operand. Address bits 8 to 15 are
specified by the direct page register (DPR). Address bits 16 to 23 are specified by the data bank register
(DTB). Bit positions are indicated by ":bp", where the larger number indicates the most significant bit
(MSB) and the lower number indicates the least significant bit (LSB).
Figure B.3-9 Example of Abbreviated Direct Bit Addressing (dir:bp)
SETB S:10H:0 (This instruction sets bits by abbreviated direct bit addressing.)
Note : "S:" is Addressing Specifier that shows the Abbreviated Direct Addressing.
●
Direct bit addressing (addr16:bp)
Specify arbitrary bits in 64 kilobytes explicitly. Address bits 16 to 23 are specified by the data bank register
(DTB). Bit positions are indicated by ":bp", where the larger number indicates the most significant bit
(MSB) and the lower number indicates the least significant bit (LSB).
SETB 2222H : 0 (This instruction sets bits by direct bit addressing.)
Before execution
After execution
544
Figure B.3-8 Example of I/O Direct Bit Addressing (io:bp)
Before execution
After execution
Before execution DTB 5 5
After execution DTB 5 5
Figure B.3-10 Example of Direct Bit Addressing (addr16:bp)
DTB 5 5
DTB 5 5
FUJITSU MICROELECTRONICS LIMITED
to 0000FF explicitly. Bit positions are indicated by ":bp",
H H
Memory space
0000C1 0 0
H
Memory space
0000C1 0 1
H
DPR 6 6 556610
DPR 6 6 556610
552222
552222
MB90335 Series
Memory space
0 0
H
Memory space
0 1
H
Memory space
0 0
H
Memory space
0 1
H
CM44-10137-6E