UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 70

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

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5.1.2 Internal data memory space
(1) Internal high-speed RAM
(2) Internal expansion RAM
5.1.3 Special function register (SFR) area
5.2.3 Special function registers (SFR) and Table 5-3 Special Function Register List).
5.1.4 External memory space
space can store program, table data, etc., and allocate peripheral devices.
The PD780078, 780078Y Subseries incorporate the following on-chip high-speed RAMs.
On-chip peripheral hardware special function registers (SFR) are allocated in the area FF00H to FFFFH (refer to
Caution Do not access addresses where an SFR is not assigned.
The external memory space is accessible using the memory expansion mode register (MEM). External memory
The 1024-byte area FB00H to FEFFH is allocated to the internal high-speed RAM. The 32-byte area FEE0H to
FEFFH is allocated to four general-purpose register banks composed of eight 8-bit registers.
This area cannot be used as a program area in which instructions are written for execution.
The internal high-speed RAM can also be used as a stack memory.
The 1024-byte area F400H to F7FFH is allocated to the internal expansion RAM.
Like the internal high-speed RAM, the internal expansion RAM can be used as a normal data area, but it can
also be used as a program area in which instructions are written for execution.
The internal expansion RAM cannot be used as a stack memory.
CHAPTER 5 CPU ARCHITECTURE
User’s Manual U14260EJ4V0UD