upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 30

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

3.1 Memory Space
30
The PD78F0730 can access a 64 KB memory space. Figure 3-1 shows the memory map.
Cautions 1. Regardless of the internal memory capacity, the initial values of the internal memory size
PD78F0730
Flash Memory Version
( PD78F0730)
2. To set the memory size, set IMS and then IXS. Set the memory size so that the internal ROM
switching register (IMS) and internal expansion RAM size switching register (IXS) are fixed
(IMS = CFH, IXS = 0CH). Therefore, set the value as indicated below.
and internal expansion RAM areas do not overlap.
Table 3-1. Set Values of Internal Memory Size Switching Register (IMS)
C4H
and Internal Expansion RAM Size Switching Register (IXS)
IMS
CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U19014EJ1V0UD
08H
IXS
16 KB
Capacity
ROM
1 KB
Internal High-Speed
RAM Capacity
2 KB
Internal Expansion
RAM Capacity