Chapter 3 Cpu Architecture; Memory Space - NEC mPD789026 Subseries User Manual

3.1 Memory Space

The µ PD789026 Subseries can access 64 Kbytes of memory space. Figures 3-1 through 3-5 show the memory
maps.
FFFFH
FF00H
FEFFH
FE00H
FDFFH
Data
Memory Space
1000H
0FFFH
Program
Memory Space
0000H

CHAPTER 3 CPU ARCHITECTURE

Figure 3-1. Memory Map ( µ µ µ µ PD789022)
Special Function Registers
256 × 8 bits
Internal High-Speed RAM
256 × 8 bits
Reserved
Internal ROM
4,096 × 8 bits
User's Manual U11919EJ3V0UM00
0FFFH
Program Area
0080H
007FH
CALLT Table Area
0040H
003FH
Program Area
002CH
002BH
Vector Table Area
0000H
41