gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 25

• Manufacturer Part Number: gc80c510
• Description: Eprom/rom 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

6.1.3.1 Addressing Modes
6.1.3.1.1 Immediate Addressing Mode
6.1.3.1.2 Direct Addressing Mode
MiDAS1.1 Family
uses six different addressing modes to this end:
the instruction in program memory.
instruction.
Note: The SFRs can be accessed only in this mode. And the lower 128 bytes of the RAM can be
Examples:
The operands used in the instructions can be addressed in different modes. The MiDAS1.1 family
Immediate addressing mode means that constants can be loaded to registers. The constant is part of
In direct addressing mode, the operand is specified by an 8-bit address field, which is part of the
Examples:
MOV R3, #0FFh
ORL PSW, #00000101b
MOV DPTR, #1243h
MOV A, TCON
MOV R4, variable
addressed in this mode, too.
Immediate
Direct
Indirect
Index
Register
Register-specific
R3 is loaded with constant value 0FFh
Logical OR operation with PSW and 0000 0101b
Load data pointer with constant value 1234h
TCON is the 8-bit address of the SFR TCON.
Variable is the 8-bit address of a memory location in the lower
part of the RAM.
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