Memory Space - Fujitsu F2MC-8L Series Hardware Manual

CHAPTER 3 CPU
3.1

Memory Space

The microcontrollers of the MB89120/120A series offer a memory space of 64 Kbytes.
The memory space consists of the I/O area, RAM area, ROM area, and external area.
The memory space contains areas used for special purposes such as the general-
purpose registers and vector table.
Memory Space Structure
I/O area (addresses: 0000
• Control registers and data registers for the internal peripheral functions are located in this
area.
• As the I/O area is allocated within the memory space, I/O can be accessed in the same way
as memory. High-speed access using direct addressing is available.
RAM area
• Internal static RAM is provided as an internal data area.
• The internal RAM size differs between products.
• Addresses between 80
• Addresses between 100
(restrictions apply for some products).
• The contents of RAM is indeterminate after a reset.
ROM area
• Internal ROM is provided as an internal program area.
• The internal ROM size differs between products.
• Addresses between FFC0
26
to 007F )
H H
and FF support high-speed access using direct addressing.
H H
and 1FF can be used as the general-purpose register area
H H
and FFFF are used for the vector table, etc.
H H