Samsung S3F80JB User Manual
Page 49
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S3F80JB
ADDRESS SPACES
2-17
Together they create an
8-bit register address
Register pointer
provides five
high-order bits
Address
OPCODE
Selects
RP0 or RP1
RP1
RP0
4-bit address
procides three
low-order bits
Figure 2-12. 4-Bit Working Register Addressing
Register
address
(76H)
RP0
R6
Selects RP0
Instruction:
'INC R6'
OPCODE
RP1
0
1
1
1
0
0
0
0
0
1
1
1
0
1
1
0
0
1
1
1
0
0
0
1
0
1
1
0
1
1
1
0
Figure 2-13. 4-Bit Working Register Addressing Example
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