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CHAPTER 3 CPU ARCHITECTURE
User’s Manual U12697EJ3V0UM
3.3 Base Area
The area from 0 to FFFFH becomes the base area. The base area is used for the following.
•
Reset entry address
•
Interrupt entry address
•
Entry address for CALLT instruction
•
16-bit immediate addressing mode (instruction address addressing)
•
16-bit direct addressing mode
•
16-bit register addressing mode (instruction address addressing)
•
16-bit register indirect addressing mode
•
Short direct 16-bit memory indirect addressing mode
This base area is allocated in the vector table area, CALLT instruction table area, and CALLF instruction entry
area.
When the LOCATION 0H instruction is executed, the internal data area is placed in the base area. Be aware that
the program is not fetched from the internal high-speed RAM area and special function register (SFR) area in the
internal data area. Also, use the data in the internal RAM area after initialization.
