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7906 Datasheet(PDF) 40 Page - Renesas Technology Corp

Part # 7906
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  531 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7906 Datasheet(HTML) 40 Page - Renesas Technology Corp

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7906 Group User’s Manual Rev.2.0
2-19
CENTRAL PROCESSING UNIT (CPU)
2.5 Processor modes
2.5 Processor modes
The M37906 operates only in the single-chip mode. Figure 2.5.1 shows the memory assignment of the
M37906.
Unused area
Internal
ROM area
(Note 2)
Unused area
016
FF16
SFR area
Single-chip mode
Internal
RAM area
(Note 1)
Notes 1: When the internal RAM area is followed by an unused area, do not assign a program to
the last 8 bytes of the internal RAM area.
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 7906 Group,” or the latest datasheets, catalogs.
Fig. 2.5.1 Memory assignment of M37906
2.5.1 Single-chip mode
In this mode, ports P1, P2, P5 to P7 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.



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