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MB90347CEPF Datasheet(PDF) 30 Page - Cypress Semiconductor |
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MB90347CEPF Datasheet(HTML) 30 Page - Cypress Semiconductor |
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30 / 93 page  Document Number: 002-04498 Rev. *A Page 29 of 92 MB90340E Series Note: :An image of the data in the FF bank of ROM is visible in the upper part of bank 00, which makes it possible for the C compiler to use the small memory model. The lower 16 bits of addresses in the FF bank are the same as the lower 16 bits of addresses in the 00 bank so that tables stored in the ROM can be accessed without using the far specifier in the pointer declaration. For example, when the address 00C000H is accessed, the data at FFC000H in ROM is actually accessed. The ROM area in bank FF exceeds 32 Kbytes, and its entire image cannot be shown in bank 00. As a result, the image between FF8000H and FFFFFFH is visible in bank 00, while the image between FF0000H and FF7FFFH is visible only in bank FF. MB90342E(S)/342CE(S) MB90F342E(S)/F342CE(S) MB90349E(S)/349CE(S) MB90F349E(S)/F349CE(S) MB90341E(S)/341CE(S) MB90348E(S)/348CE(S) MB90347E(S)/347CE(S) MB90F347E(S)/F347CE(S) MB90346E(S)/346CE(S) MB90F346E(S)/F346CE(S) FFFFFFH FF0000H FEFFFFH FE0000H FDFFFFH FD0000H FCFFFFH FC0000H 0000EFH 000000H 00FFFFH 007FFFH 007900H 003FFFH 000100H 008000H FFFFFFH FF0000H FEFFFFH FE0000H 0000EFH 000000H 00FFFFH 007FFFH 007900H 003FFFH 000100H 008000H FFFFFFH FF0000H FEFFFFH FE0000H 0000EFH 000000H 00FFFFH 007FFFH 007900H 0018FFH 000100H 008000H FFFFFFH FF0000H FEFFFFH FE0000H 0000EFH 000000H 00FFFFH 007FFFH 007900H 0008FFH 000100H 008000H ROM (FF bank) ROM (FE bank) ROM (FD bank) ROM (FC bank) External access area ROM (image of FF bank) Peripheral RAM 16 Kbytes External access area Peripheral : Not accessible External access area ROM (image of FF bank) Peripheral RAM 16 Kbytes External access area Peripheral External access area ROM (image of FF bank) Peripheral RAM 6 Kbytes External access area Peripheral External access area ROM (image of FF bank) Peripheral RAM 2 Kbytes External access area Peripheral ROM (FF bank) ROM (FE bank) ROM (FF bank) ROM (FE bank) ROM (FF bank) |
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