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uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM

uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM

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36<br />

FFFFH<br />

FF20H<br />

FF1FH<br />

FF00H<br />

FEFFH<br />

FE20H<br />

FE1FH<br />

FD00H<br />

FCFFH<br />

FA60H<br />

FA5FH<br />

FA00H<br />

F9FFH<br />

1000H<br />

0FFFH<br />

0000H<br />

CHAPTER 3 CPU ARCHITECTURE<br />

Figure 3-4. Data Memory Addressing (µPD789870)<br />

Special function registers (SFRs)<br />

256 × 8 bits<br />

Internal high-speed RAM<br />

512 × 8 bits<br />

Reserved<br />

VFD display RAM<br />

96 × 8 bits<br />

Reserved<br />

Internal ROM<br />

4,096 × 8 bits<br />

SFR addressing<br />

Preliminary User’s Manual U14938EJ1V0UM<br />

Short direct<br />

addressing<br />

Direct addressing<br />

Register indirect<br />

addressing<br />

Based addressing

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