7702 datasheet(42/217 Pages) RENESAS

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7702/7703 Group User’s Manual

CENTRAL PROCESSING UNIT (CPU)

2–16

2.3 Access space

Figure 2.3.1 shows the M37702’s access space.

By combination of the program counter (PC), which is 16 bits of structure, and the program bank register

(PG), a 16-Mbyte space from addresses 00000016 to FFFFFF16 can be accessed. For details about access

of an external area, refer to “Chapter 12. CONNECTION WITH EXTERNAL DEVICES.”

The memory and I/O devices are allocated in the same access space. Accordingly, it is possible to perform

transfer and arithmetic operations using the same instructions without discrimination of the memory from

I/O devices.

: Indicates the memory allocaton of

the internal areas.

Indicates that nothing is allocated.

Note : Memory assignment of internal area varies according to the type of microcomputer. This

figure shows the case of the M37702M2BXXXFP.

Refer to “Appendix 1. Memory assignment” for other products.

SFR : Special Function Register

00000016

00008016

00FFFF16

01000016

0E000016

FF000016

FFFFFF16

SFR area

Internal RAM area

Bank 016

Internal ROM area

02000016

00027F16

00007F16

Bank 116

Bank FF16

Bank FE16

00C00016

Fig. 2.3.1 M37702’s access space

7702 Datasheet(PDF) 42 Page - Renesas Technology Corp