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R01UH0336EJ0102 Rev.1.02
Page 128 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 3 CPU System Function
(1)
Wrap-Around of Data Space
If an operand address calculation exceeds 32 bits, only the lower 32 bits of the
result are considered. Therefore, the addresses FFFF FFFF
H
and 0000 0000
H
are contiguous addresses. This results in a wrap-around of the data space:
Figure 3-2
Wrap-Around of Data Space
(2)
Wrap-Around of Program Space
If an instruction address calculation exceeds 28 bits, only the lower 28 bits of
the result are considered. Therefore, the addresses 0000 0000
H
and 0FFF
FFFF
H
are contiguous addresses. This results in a wrap-around of the
program space:
Figure 3-3
Wrap-Around of Program Space
FFFF FFFE
H
FFFF FFFF
H
0000 0000
H
0000 0001
H
Data space
Data space
(-)
direction
(+)
direction
0FFF FFFE
H
0FFF FFFF
H
0000 0000
H
0000 0001
H
Program space
Program space
(-)
direction
(+)
direction
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