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7721 데이터시트(PDF) 38 Page - Renesas Technology Corp

부품명 7721
상세설명  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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CENTRAL PROCESSING UNIT (CPU)
7721 Group User’s Manual
2–15
2.3 Access space
2.3 Access space
Figure 2.3.1 shows the M37721’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 016 to FFFFFF16 can be accessed. For details about access of an
external area, refer to “CHAPTER 3. CONNECTION WITH EXTERNAL DEVICES.”
The memory and I/O devices are assigned 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.
Fig. 2.3.1 M37721’s access space
: Indicates the memory assignment
of the internal areas.
: Indicates that nothing is assigned.
Note : Memory assignment of internal RAM area varies according to the type of microcomputer.
This figure shows the case of the M37721S2BFP.
Refer to “Figure 2.4.1” for the M37721S1BFP.
SFR : Special Function Register
00000016
00008016
00FFFF16
01000016
FE000016
FF000016
FFFFFF16
SFR area
Internal RAM area
Bank 016
SFR area
02000016
00047F16
00007F16
Bank 116
Bank FF16
Bank FE16
001FC016
001FFF16
:
:
:
:



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