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2.4 Memory assignment
This section describes the internal area's memory assignment. For more information about the external
area, refer also to section "2.5 Processor modes."
2.4.1 Memory assignment in internal area
SFR (Special Function Register), internal RAM, and internal ROM are assigned in the internal area. Figure
2.4.1 shows the internal area's memory assignment.
(1) SFR area
The registers for setting internal peripheral devices are assigned at addresses 0
is called SFR (Special Function Register). Figure 2.4.2 shows the SFR area's memory assignment.
For each register in the SFR area, refer to each functional description in this manual.
For the state of the SFR area immediately after a reset, refer to section "13.1.2 State of CPU, SFR
area, and internal RAM area."
(2) Internal RAM area
The M37751M6C-XXXFP (See Note) assigns the 2048-byte static RAM at addresses 80
The internal RAM area is used as a stack area, as well as an area to store data. Accordingly, note
that set the nesting depth of a subroutine and multiple interrupts' level not to destroy the necessary
data.
(3) Internal ROM area
The M37751M6C-XXXFP (See Note) assigns the 48-Kbyte mask RAM at addresses 4000
Its addresses FFD6
for reset and interrupts. In the microprocessor mode where use of the internal ROM area is inhibited,
assign a ROM at addresses FFD6
Note : Refer to "Appendix 1. Memory assignment" for other products.
CENTRAL PROCESSING UNIT (CPU)
to FFFF
are the vector addresses, which are called the interrupt vector table,
16
16
to FFFF
16
7751 Group User's Manual
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16
2.4 Memory assignment
to 7F
. This area
16
16
16
to FFFF
16
to 87F
.
16
.
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2–19
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