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CONTROL REGISTERS
RP0
— Register Pointer 0
Bit Identifier
RESET Value
Read/Write
Addressing Mode
.7–.3
.2–.0
RP1
— Register Pointer 1
Bit Identifier
RESET Value
Read/Write
Addressing Mode
.7–.3
.2–.0
4-24
.7
.6
1
1
R/W
R/W
Register addressing mode only
Destination Register Page Selection Bits
Register pointer 0 can independently point to one of the 24 8-byte working register
areas in the register file. Using the register pointers RP0 and RP1, you can select two
8-byte register slices at one time as active working register space. After a reset, RP0
points to address C0H in register set 1, selecting the 8-byte working register slice
C0H–C7H.
Not used for S3C80A5B.
.7
.6
1
1
R/W
R/W
Register addressing mode only
Register Pointer 1 Address Value
Register pointer 1 can independently point to one of the 24 8-byte working register
areas in the register file. Using the register pointers RP0 and RP1, you can select two
8-byte register slices at one time as active working register space. After a reset, RP1
points to address C8H in register set 1, selecting the 8-byte working register slice
C8H–CFH.
Not used for S3C80A5B.
.5
.4
0
0
R/W
R/W
R/W
.5
.4
0
0
R/W
R/W
R/W
D6H
.3
.2
.1
0
–
–
–
–
D7H
.3
.2
.1
1
–
–
–
–
S3C80A5B
Set 1
.0
–
–
Set 1
.0
–
–
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