NEC V850E/Dx3 Preliminary User's Manual page 118

Chapter 3
118
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(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 0000 0000
are contiguous addresses. This results in a wrap-around of the data space:
Figure 3-5 Wrap-around of data space
(2) Wrap-around of program space
If an instruction address calculation exceeds 26 bits, only the lower 26 bits of
the result are considered. Therefore, the addresses 0000 0000
03FF FFFF are contiguous addresses. This results in a wrap-around of the
H
program space:
Figure 3-6 Wrap-around of program space
Caution No instruction can be fetched from the 4 KB area of 03FF F000
03FF FFFF because this area is defined as peripheral I/O area. Therefore, do
H
not execute any branch to this area.
Preliminary User's Manual U17566EE1V2UM00
Data space
FFFF FFFEH
FFFF FFFFH
0000 0000H
0000 0001H
Data space
Program space
03FF FFFEH
03FF FFFFH
0000 0000H
0000 0001H
Program space
CPU System Functions
and FFFF FFFF
H
(+) (-)
direction direction
and
H
(+) (-)
direction direction
to
H
H