m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 38

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

2.4 Memory assignment
This section describes the memory assignment in the internal area.
2.4.1 Memory assignment in internal area
SFR (Special Function Register), internal RAM, and internal ROM are assigned to the internal area. Figure
2.4.1 shows the memory assignment in the internal area.
(1) SFR area
(2) Internal RAM area
(3) Internal ROM area
area is called SFR. Figures 2.4.2 and 2.4.3 show the SFR area’s memory assignment.
sure to set the nesting depth of a subroutine and multiple interrupts’ level not to destroy the necessary
data.
bytes of the internal RAM area. (Data is allowed to be assigned there. Also, when the internal RAM
area is followed by the internal ROM area succeedingly, a program is allowed to be assigned there.)
interrupt vector table.)
there.)
The registers used to set the internal peripheral devices are assigned to addresses 0
For each register in the SFR area, refer to each functional description in this manual.
For the state of the SFR area immediately after reset, refer to section “3.3 State of internal area.”
The internal RAM area is used as a stack area, as well as an area to store data. Accordingly, be
When the internal RAM area is followed by an unused area, do not assign a program to the last 8
Addresses FFB4
Do not assign a program to the last 8 bytes of the internal ROM area. (Data is allowed to be assigned
16
to FFFF
16
CENTRAL PROCESSING UNIT (CPU)
are the vector addresses for reset and interrupts. (This is called the
7905 Group User’s Manual Rev.1.0
2.4 Memory assignment
16
to FF
16
. This
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