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R8C-2G Datasheet(PDF) 11 Page - Renesas Technology Corp |
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R8C-2G Datasheet(HTML) 11 Page - Renesas Technology Corp |
11 / 43 page R8C/2G Group 3. Memory Rev.1.00 Apr 04, 2008 Page 11 of 41 REJ03B0223-0100 3. Memory Figure 3.1 is a Memory Map of R8C/2G Group. The R8C/2G group has 1 Mbyte of address space from addresses 00000h to FFFFFh. The internal ROM is allocated lower addresses, beginning with address 0FFFFh. For example, a 16-Kbyte internal ROM area is allocated addresses 0C000h to 0FFFFh. The fixed interrupt vector table is allocated addresses 0FFDCh to 0FFFFh. They store the starting address of each interrupt routine. 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 storing data but also for calling subroutines and as stacks when interrupt requests are acknowledged. Special function registers (SFRs) are allocated addresses 00000h to 002FFh. The peripheral function control registers are allocated here. All addresses within the SFR, which have nothing allocated are reserved for future use and cannot be accessed by users. Figure 3.1 Memory Map of R8C/2G Group Undefined instruction Overflow BRK instruction Address match Single step Watchdog timer/voltage monitor/comparator (Reserved) (Reserved) Reset 00400h 002FFh 00000h Internal RAM SFR (Refer to 4. Special Function Registers (SFRs)) 0FFFFh 0FFDCh NOTE: 1. The blank regions are reserved. Do not access locations in these regions. FFFFFh 0FFFFh 0YYYYh Internal ROM (program ROM) 0XXXh Part Number Internal ROM Internal RAM Size Size R5F212G4SNFP, R5F212G4SDFP R5F212G5SNFP, R5F212G5SDFP R5F212G6SNFP, R5F212G6SDFP 16 Kbytes 24 Kbytes 32 Kbytes 0C000h 0A000h 08000h 512 bytes 1 Kbyte 1 Kbyte 005FFh 007FFh 007FFh Address 0YYYYh Address 0XXXXh |
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