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| 型号： | R5F6461ELFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 48 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件页数： | 8/72页 |
| 文件大小： | 839K |
| 代理商： | R5F6461ELFP |
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REJ03B0241-0010 Rev.0.10 Feb 14, 2008
Page 16 of 70
Under development
Preliminary Specification
Specifications in this preliminary version are subject to change.
R32C/161 Group
3. Memory
3.
Memory
Figure 3.1 shows a memory mapping of the R32C/161 Group.
The R32C/161 Group provides 4-Gbyte address space from 00000000h to FFFFFFFFh.
The internal ROM is allocated from address FFFFFFFFh to lower. For example, a 256-Kbyte internal ROM
is addressed from FFFC0000h to FFFFFFFFh.
The fixed interrupt vectors are allocated from address FFFFFFDCh to FFFFFFFFh in which the starting
address of each interrupt handler is stored.
The internal RAM is allocated from address 00000400h to higher. For example, a 20-Kbyte internal RAM is
addressed from 00000400h to 000053FFh. Besides being used for data storage, the internal RAM functions
as stack(s) for a subroutine and/or an interrupt handler.
Special Function Registers (SFR), consisting of control registers for peripheral functions, are allocated from
address 00000000h to 000003FFh and from 00040000h to 0004FFFFh. Any blank spaces within the SFR
are reserved. No access is allowed.
Figure 3.1
Memory Mapping
Internal RAM
SFR1
SFR2
Internal ROM
00000000h
FFFFFFFFh
Reset
NMI
Reserved
Watchdog timer (2)
Reserved
BRK instruction
Overflow
Undefined instruction
FFFFFFFFh
FFFFFFDCh
Notes:
1. Additional two 4-Kbyte spaces (blocks A and B) for storing data are provided in the flash memory version.
2. The watchdog timer interrupt shares the vector table with the oscillation stop detection interrupt and low-
voltage detection interrupt.
YYYYYYYYh
00000400h
XXXXXXXXh
Reserved
00040000h
Internal ROM
(Data space) (1)
00060000h
00062000h
Reserved
00050000h
Reserved
Internal RAM
Capacity
XXXXXXXXh
12 K bytes
00003400h
Internal ROM
Capacity
YYYYYYYYh
128 K bytes FFFE0000h
256 K bytes FFFC0000h
20 K bytes
00005400h
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