7733 datasheet(63/940 Pages) RENESAS

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CENTRAL PROCESSING UNIT (CPU)

7733 Group User’s Manual

2–24

2.5 Processor modes

The M37733MHBXXXFP can operate in the following three processor modes: single-chip mode, memory

expansion mode, and microprocessor mode. In the M37733MHBXXXFP, some pins’ functions, memory

allocation, and accessible area differ according to processor modes. These differences according to processor

modes are described below. Figure 2.5.1 shows the memory map in each processor mode.

2.5 Processor modes

00000016

01FFFF16

00008016

02000016

FFFFFF16

000FFF16

00100016

Notes 1:

represents external memory area.

By accessing this area, an external device connected to the M37733MHBXXXFP

can be accessed.

This is applied when the contents of memory allocation selection bits (bits 2 to 0 at

address 6316) = “0002.”

For the 7733 Group’s microcomputers other than the M37733MHBXXXFP, refer to

section “Appendix 1. Memory allocation of 7733 Group.”

SFR area

Internal

ROM area

(Note 2)

Single-chip mode

Internal

RAM area

SFR area

Memory expansion mode

SFR area

Microprocessor mode

Internal

RAM area

Internal

RAM area

Internal

ROM area

(Note 2)

Fig. 2.5.1 Memory map in each processor mode (M37733MHBXXXFP)

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