UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 59

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

3.1.5 Data memory addressing
or memory to be manipulated when an instruction is executed is called addressing.
3.3 Instruction Address Addressing).
modes for memory addresses that are operational objects during instruction execution. Especially, in the areas to
which the data memory is assigned (addresses FB00H to FFFFH), the special function registers (SFRs) and general-
purpose registers can be addressed in accordance with their function. Figures 3-7 to 3-12 illustrate the addressing
of the data memory.
The manner of specifying the address of the instruction to be executed next or specifying the address of a register
The address of the instruction to be executed next is specified by the program counter (PC) (for details, refer to
However, in consideration of operability, the PD780988 Subseries is equipped with a wide range of addressing
For details of each addressing, refer to 3.4 Operand Address Addressing.
FFFFH
FF20H
FF1FH
FF00H
FEFFH
FEE0H
FEDFH
FE20H
FE1FH
FB00H
FAFFH
3FFFH
4100H
40FFH
4000H
0000H
General-purpose registers
Internal high-speed RAM
32
Special function
registers (SFRs)
External memory
16,384
256
Internal ROM
1,024
256
8 bits
Reserved
Figure 3-7. Data Memory Addressing ( PD780982)
8 bits
8 bits
8 bits
8 bits
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U13029EJ7V1UD
SFR addressing
Register addressing
Short direct
addressing
Direct addressing
Register indirect
addressing
Based addressing
Based indexed
addressing
57