Chapter 4 Cpu Architecture; Memory Space - NEC mPD789101 User Manual

4.1 Memory Space

The µ PD789134 Subseries can access 64 Kbytes of memory space. Figures 4-1 through 4-4 show the memory
maps.
Figure 4-1. Memory Map ( µ PD789101, 789111, 789121, 789131)
FFFFH
FEFFH
FE00H
FDFFH
Data
memory space
Program
memory space

CHAPTER 4 CPU ARCHITECTURE

Special function registers
256 × 8 bits
FF00H
Internal high-speed RAM
256 × 8 bits
Reserved
0800H
07FFH
Internal ROM
2,048 × 8 bits
0000H
User's Manual U13045EJ2V0UM00
07FFH
Program area
0080H
007FH
CALLT table area
0040H
003FH
Program area
0016H
0015H
Vector table area
0000H
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