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ADDRESSING MODES
S3P80C5/C80C5/C80C8
3-6
INDIRECT REGISTER ADDRESSING MODE (Continued)
dst
OPCODE
4-bit Working
Register Address
Sample Instructions:
LDC
R5,@RR6
; Program memory access
LDE
R3,@RR14
; External data memory access
LDE
@RR4, R8
; External data memory access
Program Memory
Register File
src
Value used in
Instruction
OPERAND
Example Instruction
References either
Program Memory or
Data Memory
Program Memory
or
Data Memory
Next 2-bit Point
to Working
Register Pair
(1 of 4)
LSB Selects
Register
Pair
16-Bit
Address
Points to
Program
Memory or
Data
Memory
RP0 or RP1
MSB Points to
RP0 or RP1
Selected
RP Points
to Start of
Working
Register
Block
NOTE:
LDE command is not available, because an external interface is not implemented for
the S3C80C5/C80C8/C80C4.
Figure 3-6. Indirect Working Register Addressing to Program or Data Memory
Summary of Contents for S3P80C5
Page 2: ...S3P80C5 C80C5 C80C8 8 BIT CMOS MICROCONTROLLERS USER S MANUAL Revision 1 ...
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Page 49: ...ADDRESS SPACES S3P80C5 C80C5 C80C8 2 20 NOTES ...
Page 197: ...INSTRUCTION SET S3P80C5 C80C5 C80C8 6 88 NOTES ...
Page 201: ...CLOCK CIRCUITS S3P80C5 C80C5 C80C8 7 4 NOTES ...
Page 237: ...TIMER 1 S3P80C5 C80C5 C80C8 11 6 NOTES ...
Page 245: ...COUNTER A S3P80C5 C80C5 C80C8 12 8 NOTES ...
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