M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 61

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.4.3
(1) Program space
(2) Data space
Of the 32 bits of the PC (program counter), the higher 6 bits are fixed to 0, and only the lower 26 bits are valid.
Even if a carry or borrow occurs from bit 25 to 26 as a result of a branch address calculation, the higher 6 bits
ignore the carry or borrow.
Therefore, the upper-limit address of the program space, address 03FFFFFFH, and the lower-limit address
00000000H become contiguous addresses. Wraparound refers to a situation like this whereby the lower-limit
address and upper-limit address become contiguous.
Caution The 4 KB area of 03FFF000H to 03FFFFFFH can be seen as an image of 0FFFF000H to
The result of an operand address calculation that exceeds 32 bits is ignored.
Therefore, the upper-limit address of the program space, address FFFFFFFFH, and the lower-limit address
00000000H are contiguous addresses, and the data space is wrapped around at the boundary of these
addresses.
Wraparound of CPU address space
0FFFFFFFH. This area is access-prohibited. Therefore, do not execute any branch address
calculation in which the result will reside in any part of this area.
00000001H
00000000H
03FFFFFFH
FFFFFFFFH
FFFFFFFEH
03FFFFFEH
00000001H
00000000H
Program space
Program space
Data space
Data space
CHAPTER 3 CPU FUNCTION
User’s Manual U16543EJ4V0UD
(+) direction
(+) direction
(–) direction
(–) direction
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