参数资料
型号: R5F21154DSP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO20
封装: 4.40 X 6.50 MM, 0.65 MM PITCH, PLASTIC, LSSOP-20
文件页数: 6/40页
文件大小: 700K
代理商: R5F21154DSP
Rev.2.00
Jan 30, 2006
Page 14 of 37
REJ03B0102-0200
R8C/14 Group, R8C/15 Group
3. Memory
3.2
R8C/15 Group
Figure 3.2 is a Memory Map of R8C/15 Group. The R8C/15 group provides 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 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 ROM (data flash) is allocated addresses 02400h to 02BFFh.
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.
Figure 3.2
Memory Map of R8C/15 Group
Undefined Instruction
Overflow
BRK Instruction
Address Match
Single Step
Watchdog Timer Oscillation Stop Detection Voltage Monitor 2
Address Break
(Reserved)
Reset
Part Number
Internal ROM
Internal RAM
Size
0YYYYh
R5F21154SP, R5F21154DSP
R5F21153SP, R5F21153DSP
R5F21152SP, R5F21152DSP
16K bytes
12K bytes
8K bytes
0C000h
0D000h
0E000h
1K byte
768 bytes
512 bytes
007FFh
006FFh
005FFh
FFFFFh
0FFFFh
0YYYYh
0XXXXh
00400h
002FFh
00000h
Internal ROM
(Program ROM)
Expansion Area
Internal RAM
SFR
(See 4. Special Function
Register (SFR))
0FFFFh
0FFDCh
Size
0XXXXh
02BFFh
02400h
Internal ROM
(Data Flash)(1)
NOTES:
1. The data flash block A (1 Kbyte) and block B (1 Kbyte) are shown.
2. Blank spaces are reserved. No access is allowed.
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