m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 42

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

M37905.
2.5 Processor modes
The M37905 operates only in the single-chip mode. Figure 2.5.1 shows the memory assignment of the
Fig. 2.5.1 Memory assignment of M37905
2.5.1 Single-chip mode
In this mode, ports P1, P2, P4 to P8 serve as programmable I/O ports. (When an internal peripheral device
is used, the corresponding port pin serves as the device’s I/O pin).
In this mode, only the internal area (SFR, internal RAM, and internal ROM) can be accessed.
Notes 1: When the internal RAM area is followed by an unused area, do not assign a program to
2: Do not assign a program to the last 8 bytes of the internal ROM area.
3: The memory assignment of the internal area varies according to the product type.
Refer to section “Appendix 11. Memory assignment of 7905 Group,” or the latest datasheets, catalogs.
the last 8 bytes of the internal RAM area.
FF
CENTRAL PROCESSING UNIT (CPU)
0
16
16
7905 Group User’s Manual Rev.1.0
Single-chip mode
Unused area
Unused area
ROM area
SFR area
RAM area
(Note 1)
(Note 2)
Internal
Internal
2.5 Processor modes
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