Common Working Register Area (C0H-Cfh) - Samsung S3F80JB User Manual

S3F80JB
COMMON WORKING REGISTER AREA (C0H–CFH)
After a reset, register pointers RP0 and RP1 automatically select two 8-byte register slices in set 1, locations
C0H–CFH, as the active 16-byte working register block:
RP0 → C0H–C7H
RP1 → C8H–CFH
This 16-byte address range is called common area. That is, locations in this area can be used as working
registers by operations that address any location on any page in the register file. Typically, these working
registers serve as temporary buffers for data operations.
Set 1
FFH
F0H
E0H
D0H
C0H
Following a hareware reset, register
pointers RP0 and RP1 point to the
common working register
area, locations C0H-CFH.
1 1 0 0 0 0 0
RP0 =
RP1 = 1 1 0 0 1 0 0
Figure 2-11. Common Working Register Area
FFH
Page 0
Set 2
C0H
BFH
Page 0
Prime
~
Area
0
0
00H
ADDRESS SPACES
~
2-15