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ADDRESSING MODES
KS86C6004/C6008/P6008 MICROCONTROLLER (Preliminary Spec)
3-12
RELATIVE ADDRESS MODE (RA)
In Relative Address (RA) mode, a two's-complement signed displacement between – 128 and + 127 is specified
in the instruction. The displacement value is then added to the current PC value. The result is the address of the
next instruction to be executed. Before this addition occurs, the PC contains the address of the instruction
immediately following the current instruction.
The instructions that support RA addressing is JR.
PROGRAM MEMORY
PROGRAM MEMORY
ADDRESS USED
DISPLACEMENT
OPCODE
SIGNED
DISPLACEMENT
VALUE
+
CURRENT
PC VALUE
CURRENT
INSTRUCTION
NEXT OPCODE
SAMPLE INSTRUCTION:
JR ULT,$+OFFSET ; Where OFFSET is a value in the range
+127 to
=
28
Figure 3-12. Relative Addressing
IMMEDIATE MODE (IM)
In Immediate (IM) addressing mode, the operand value used in the instruction is the value supplied in the
operand field itself. Immediate addressing mode is useful for loading constant values into registers.
PROGRAM MEMORY
(THE OPERAND VALUE IS IN THE INSTRUCTION
OPCODE
OPERAND
SAMPLE INSTRUCTION: LD R0,#0AAH
Figure 3-13. Immediate Addressing
Содержание KS86C6004
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Страница 61: ...CONTROL REGISTERS KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec 4 30 NOTES ...
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Страница 134: ...I O PORTS KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec 9 10 NOTES ...
Страница 143: ...KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec BASIC TIMER and TIMER 0 10 9 NOTES ...
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Страница 172: ...KS86P6008 OTP KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec 14 6 NOTES ...