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CHAPTER 2 CPU
2.2 Memory Space
■ ROM Area
●
Vector table area (address: FFFC00
• This area is used as a vector table for the reset, interrupt, and CALLV vectors.
• This area is allocated at the highest addresses of the ROM area. The start address of the corresponding
processing routine is set as data in each vector table address.
●
Program area (address: Up to FFFBFF
• ROM is built in as an internal program area.
• The size of internal ROM varies depending on the model.
■ RAM Area
●
Data area (address: 000100
• The static RAM is built in as an internal data area.
• The size of internal RAM varies depending on the model.
●
General-purpose register area (address: 000180
• Auxiliary registers, used for 8-bit, 16-bit, and 32-bit arithmetic operations and transfer, are allocated in
this area.
• Since this area is allocated to a part of the RAM area, it can be used as ordinary RAM.
• When this area is used as a general-purpose register, general-purpose register addressing enables high
speed access with short instructions.
●
Extended intelligent I/O service (El
• This area retains the transfer modes, I/O addresses, transfer count, and buffer addresses.
• Since this area is allocated to a part of the RAM area, it can be used as ordinary RAM.
■ I/O Area
●
Interrupt control register area (address: 0000B0
The interrupt control registers (ICR00 to ICR15) support all peripheral functions that have an interrupt
function, and perform the interrupt levels setting and the control of the extended intelligent I/O service
2
(EI
OS).
●
Peripheral function control register area
(address: 000020
This register controls the peripheral functions and inputs/outputs of data.
●
I/O port control register area (address: 000000
This register controls I/O ports, and inputs/outputs of data.
22
to FFFFFF
H
)
H
to 0018FF
H
H
2
OS) descriptor area (address: 0000100
to 0000AF
, 0000C0
H
H
H
FUJITSU MICROELECTRONICS LIMITED
)
H
(for 6Kbytes))
to 00037F
)
H
H
to 0000BF
)
H
H
to 0000EF
, and 007900
H
to 00001F
)
H
H
MB90335 Series
to 00017F
)
H
H
to 007FFF
)
H
H
CM44-10137-6E
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