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R5F21142SP-U0 View Datasheet(PDF) - Renesas Electronics

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R5F21142SP-U0 Datasheet PDF : 277 Pages
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R8C/14 Group, R8C/15 Group
3. Memory
3. Memory
3.1 R8C/14 Group
Figure 3.1 is a Memory Map of R8C/14 Group. The R8C/14 group provides 1-Mbyte 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 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 is allocated addresses 00400h to 007FFh. The internal RAM is used not only for
storing data but for calling subroutines and stacks when interrupt request is acknowledged.
Special function registers (SFR) are allocated addresses 00000h to 002FFh. The peripheral function
control registers are allocated them. All addresses, which have nothing allocated within the SFR, are
reserved area and cannot be accessed by users.
00000h
002FFh
SFR
(See 4. Special Function
Register (SFR))
00400h
Internal RAM
0XXXXh
0YYYYh
0FFFFh
Internal ROM
0FFDCh
0FFFFh
Undefined Instruction
Overflow
BRK Instruction
Address Match
Single Step
Watchdog Timer•Oscillation Stop Detection•Voltage Monitor 2
Address Break
(Reserved)
Reset
Expansion Area
FFFFFh
NOTES:
1. Blank spaces are reserved. No access is allowed.
Part Number
R5F21144SP, R5F21144DSP
R5F21143SP, R5F21143DSP
R5F21142SP, R5F21142DSP
Internal ROM
Size
16 Kbytes
12 Kbytes
8 Kbytes
0YYYYh
0C000h
0D000h
0E000h
Internal RAM
Size
1 Kbytes
768 bytes
512 bytes
0XXXXh
007FFh
006FFh
005FFh
Figure 3.1 Memory Map of R8C/14 Group
Rev.2.10 Jan 19, 2006 Page 13 of 253
REJ09B0164-0210
 

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