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R5F21354DNFP Datasheet(PDF) 13 Page - Renesas Technology Corp |
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R5F21354DNFP Datasheet(HTML) 13 Page - Renesas Technology Corp |
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13 / 46 page  R8C/35D Group 3. Memory REJ03B0286-0100 Rev.1.00 Page 13 of 43 Mar 26, 2010 3. Memory 3.1 R8C/35D Group Figure 3.1 is a Memory Map of R8C/35D Group. The R8C/35D Group has a 1-Mbyte address space from addresses 00000h to FFFFFh. The internal ROM (program ROM) is allocated lower addresses, beginning with address 0FFFFh. For example, a 32-Kbyte internal ROM area is allocated addresses 08000h to 0FFFFh. The fixed interrupt vector table is allocated addresses 0FFDCh to 0FFFFh. The starting address of each interrupt routine is stored here. The internal RAM is allocated higher addresses, beginning with address 00400h. For example, a 1-Kbyte internal RAM area is allocated addresses 00400h to 007FFh. The internal RAM is used not only for data storage but also as a stack area when a subroutine is called or when an interrupt request is acknowledged. Special function registers (SFRs) are allocated addresses 00000h to 002FFh. Peripheral function control registers are allocated here. All unallocated spaces within the SFRs are reserved and cannot be accessed by users. Figure 3.1 Memory Map of R8C/35D Group Part Number R5F21354DNFP, R5F21354DDFP R5F21355DNFP, R5F21355DDFP R5F21356DNFP, R5F21356DDFP Internal ROM Internal RAM Size Address 0YYYYh Size Address 0XXXXh 16 Kbytes 24 Kbytes 32 Kbytes 0C000h 0A000h 08000h 1 Kbyte 1 Kbyte 1 Kbyte 007FFh 007FFh 007FFh 0FFFFh 0FFDCh Note: 1. The blank areas are reserved and cannot be accessed by users. FFFFFh 0FFFFh 0YYYYh 0XXXXh 00400h 002FFh 00000h Internal ROM (program ROM) Internal RAM SFR (Refer to 4. Special Function Registers (SFRs)) 0FFD8h Reserved area Undefined instruction Overflow BRK instruction Address match Single step Watchdog timer, oscillation stop detection, voltage monitor (Reserved) (Reserved) Reset |
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