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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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7721 датащи(PDF) 38 Page - Renesas Technology Corp |
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7721 датащи(HTML) 38 Page - Renesas Technology Corp |
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38 / 577 page  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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