UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 81

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

3.3 BASE AREA
data area, program fetches cannot be performed from the internal high-speed RAM area or special function register (SFR) area.
Also, internal RAM area data should only be used after initialization has been performed.
The space from 0 to FFFFH comprises the base area. The base area is the object for the following uses:
The vector table area, CALLT instruction table area and CALLF instruction entry area are allocated to the base area.
When the LOCATION 0 instruction is executed, the internal data area is located in the base area. Note that, in the internal
• Reset entry address
• Interrupt entry address
• CALLT instruction entry address
• 16-bit immediate addressing mode (with instruction address addressing)
• 16-bit direct addressing mode
• 16-bit register addressing mode (with instruction address addressing)
• 16-bit register indirect addressing mode
• Short direct 16-bit memory indirect addressing mode
CHAPTER 3 CPU ARCHITECTURE
41