UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 31

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

3.1.3 Special function register (SFR) area
Table 3-3).
3.1.4 Data memory addressing
possible. The area (FE80H to FEFFH or 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.
Special function registers (SFRs) of on-chip peripheral hardware are allocated to the area of FF00H to FFFFH (see
The 78K0S/KA1+ is provided with a wide range of addressing modes to make memory manipulation as efficient as
F F F F H
F F 2 0 H
F F 1 F H
F F 0 0 H
F E F F H
F E 8 0 H
F E 7 F H
0 8 0 0 H
0 7 F F H
0 0 0 0 H
Special function registers (SFR)
Internal high-speed RAM
Use prohibited
Flash memory
2,048
128
256
Figure 3-3. Data Memory Addressing ( PD78F9221)
8 bits
8 bits
8 bits
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U16898EJ5V0UD
SFR addressing
Short direct addressing
Direct addressing
Register indirect addressing
Based addressing
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