R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 19

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ03B0117-0300
3.2
Figure 3.2
R5F21254SNFP, R5F21254SNXXXFP,
R5F21254SDFP, R5F21254SDXXXFP,
R5F21254SNLG, R5F21254SNXXXLG
R5F21255SNFP, R5F21255SNXXXFP,
R5F21255SDFP, R5F21255SDXXXFP
R5F21256SNFP, R5F21256SNXXXFP,
R5F21256SDFP, R5F21256SDXXXFP,
R5F21256SNLG, R5F21256SNXXXLG
R5F21257SNFP, R5F21257SNXXXFP,
R5F21257SDFP, R5F21257SDXXXFP
R5F21258SNFP, R5F21258SNXXXFP,
R5F21258SDFP, R5F21258SDXXXFP
Figure 3.2 is a Memory Map of R8C/25 Group. The R8C/25 group has 1 Mbyte of 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. They store the starting address of each
interrupt routine.
The internal ROM (data flash) is allocated addresses 02400h to 02BFFh.
The internal RAM area is allocated higher addresses, beginning with address 00400h. For example, a 2-Kbyte
internal RAM is allocated addresses 00400h to 00BFFh. 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.
0XXXXh
0YYYYh
FFFFFh
02BFFh
0FFFFh
1ZZZZh
002FFh
00000h
00400h
02400h
NOTES:
R8C/25 Group
Feb 29, 2008
1. Data flash block A (1 Kbyte) and B (1 Kbyte) are shown.
2. The blank regions are reserved. Do not access locations in these regions.
Part Number
Memory Map of R8C/25 Group
Function Registers
(Refer to 4. Special
(program ROM)
(program ROM)
Internal ROM
Internal ROM
Internal ROM
Internal RAM
(data flash)
(SFRs))
SFR
Page 17 of 51
(1)
16 Kbytes
24 Kbytes
32 Kbytes
48 Kbytes
64 Kbytes
Size
Address 0YYYYh
0FFDCh
0FFFFh
0C000h
Internal ROM
0A000h
08000h
04000h
04000h
Watchdog timer/oscillation stop detection/voltage monitor
Address 1ZZZZh
13FFFh
Undefined instruction
−
−
−
−
BRK instruction
Address match
Single step
(Reserved)
(Reserved)
Overflow
Reset
2.5 Kbytes
2 Kbytes
2 Kbytes
3 Kbytes
1 Kbyte
Size
Internal RAM
Address 0XXXXh
00BFFh
00BFFh
00DFFh
007FFh
00FFFh
3. Memory