UPD705100GJ-100-8 NEC [NEC], UPD705100GJ-100-8 Datasheet - Page 8

• Manufacturer Part Number: UPD705100GJ-100-8
• Description: V830TM 32-BIT MICROCONTROLLER
• Manufacturer: NEC [NEC]

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2. ADDRESS SPACE
2.1 Memory Space
chip select function is used, a 256M-byte image space is created as three spaces and a 32M-byte image space is
created as one space. When the chip select function is not used, a 4G-byte linear address space is created.
accessed, the cache function is not effective. For all other areas, the cache function is effective.
an instruction can be fetched and data loaded/stored within one cycle (internal clock) without activating a bus cycle
externally. Data in the built-in instruction RAM, however, cannot be accessed by using the load/store instructions. Nor
can instructions be fetched from the built-in data RAM. These built-in RAMs are mapped to the cachable area; however,
they are not cached.
The V830 uses four chip select/address pins and 26 address bus pins to represent a 32-bit address. When the
Area 40000000H-7FFFFFFFH in the memory space is reserved as an uncachable area. When this area is
Within the memory space, built-in instruction RAM and built-in data RAM are mapped. By accessing these areas,
PD705100