R01DS0012EJ0110_15 Datasheet, PDF (24/70 Pages) Renesas Technology Corp – RENESAS MCU

R8C/34W Group, R8C/34X Group, R8C/34Y Group, R8C/34Z Group
3. Memory
3.2 R8C/34X Group
Figure 3.2 is a Memory Map of R8C/34X Group. The R8C/34X 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 48-Kbyte internal ROM area is allocated addresses 04000h 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 4-Kbyte internal
RAM area is allocated addresses 00400h to 013FFh. 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 and 02C00h to 02FFFh (the SFR areas
for the CAN, DTC, and other modules). Peripheral function control registers are allocated here. All unallocated
spaces within the SFRs are reserved and cannot be accessed by users.
00000h
002FFh
00400h
0XXXXh
SFR
(Refer to 4. Special
Function Registers
(SFRs))
Internal RAM
02C00h
02FFFh
SFR ⁽¹⁾
(Refer to 4. Special Function
Registers (SFRs))
0YYYYh
0FFFFh
ZZZZZh
Internal ROM
(program ROM)
Internal ROM
(program ROM)
0FFDCh
0FFFFh
Undefined instruction
Overflow
BRK instruction
Address match
Single step
Watchdog timer, oscillation stop detection, voltage monitor
Address break
(Reserved)
Reset
FFFFFh
Notes:
1. The SFR areas for the CAN, DTC and other modules are allocated to addresses 02C00h to 02FFFh.
2. The blank areas are reserved and cannot be accessed by users.
Part Number
R5F21346XJFP, R5F21346XKFP
R5F21347XJFP, R5F21347XKFP
R5F21348XJFP, R5F21348XKFP
R5F2134AXJFP, R5F2134AXKFP
R5F2134CXJFP, R5F2134CXKFP
Size
32 Kbytes
48 Kbytes
64 Kbytes
96 Kbytes
128 Kbytes
Internal ROM
Address 0YYYYh Address ZZZZZh
08000h
04000h
04000h
04000h
04000h
13FFFh
1BFFFh
23FFFh
Internal RAM
Size
Address 0XXXXh
2.5 Kbytes
4 Kbytes
6 Kbytes
8 Kbytes
10 Kbytes
00DFFh
013FFh
01BFFh
023FFh
02BFFh
Figure 3.2 Memory Map of R8C/34X Group
R01DS0012EJ0110 Rev.1.10
Jan 31, 2013
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