UPD78F9234MC-5A4-A Datasheet, PDF (33/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 3 CPU ARCHITECTURE
3.1.3 Special function register (SFR) area
Special function registers (SFRs) of on-chip peripheral hardware are allocated to the area of FF00H to FFFFH (see
Table 3-3).
3.1.4 Data memory addressing
The 78K0S/KB1+ is provided with a wide range of addressing modes to make memory manipulation as efficient as
possible. The area (FE00H to FEFFH) which contains a data memory and the special function register area (SFR)
can be accessed using a unique addressing mode in accordance with each function. Figures 3-3 and 3-4 illustrate the
data memory addressing.
Figure 3-3. Data Memory Addressing (μPD78F9232)
FFFFH
FF20H
FF1FH
FF00H
FEFFH
Special function registers (SFR)
256 × 8 bits
SFR addressing
FE20H
FE1FH
FE00H
FDFFH
Internal high-speed RAM
256 × 8 bits
Use prohibited
Short direct addressing
Direct addressing
Register indirect addressing
Based addressing
1000H
0FFFH
0000H
Flash memory
4,096 × 8 bits
User’s Manual U17446EJ5V0UD
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