Access Space - Renesas 7700 FAMILY User Manual

2.3 Access space

Figure 2.3.1 shows the M37751'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 0
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.
000000
00007F
000080
00087F
004000
00FFFF
010000
020000
FE0000
FF0000
FFFFFF
Note : Memory assignment of internal area varies according to the type of microcomputer. This
SFR : Special Function Register
Fig. 2.3.1 M37751's access space
CENTRAL PROCESSING UNIT (CPU)
to FFFFFF
16
16
SFR area
16
16
Internal RAM area
16
16
Internal ROM area
16
16
16
16
16
16
figure shows the case of the M37751M6C-XXXFP.
Refer to "Appendix 1. Memory assignment" for other products.
7751 Group User's Manual
can be accessed. For details about access of an
16
Bank 0
16
Bank 1
16
Bank FE
16
: Indicates the memory assignment of
the internal areas.
Bank FF
16
: Indicates that nothing is assigned.
2.3 Access space
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