UPD78F9500MA-CAC-A Datasheet, PDF (35/342 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcontrollers

CHAPTER 3 CPU ARCHITECTURE
3.1.2 Internal data memory space
128-byte internal high-speed RAM is provided in the 78K0S/KU1+.
The internal high-speed RAM can also be used as a stack memory.
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/KU1+ are provided with a wide range of addressing modes to make memory manipulation as efficient
as possible. The area (FE80H to FEFFH) which contains a data memory and the special function register (SFR) area
can be accessed using a unique addressing mode in accordance with each function. Figures 3-4 to 3-6 illustrate the
data memory addressing.
<R>
Figure 3-4. Data Memory Addressing (μPD78F9200, 78F9500)
FFFFH
FF20H
FE1FH
FF00H
FEFFH
Special function registers (SFR)
256 × 8 bits
SFR addressing
Internal high-speed RAM
128 × 8 bits
Short direct addressing
FE80H
FE7FH
Use prohibted
Direct addressing
Register indirect addressing
Based addressing
0400H
03FFH
0000H
Flash memory
1,024 × 8 bits
User’s Manual U18172EJ3V0UD
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