R5F21237KFP#U1 Datasheet R5F21236JFP, R5F2122CJFP#U0, R5F21236KFP#U1 | P16-P18

R8C/22 Group, R8C/23 Group 3. Memory

Rev.2.00 Aug 20, 2008 Page 14 of 48

REJ03B0097-0200

3.2 R8C/23 Group

Figure 3.2 shows a Memory Map of R8C/23 Group. The R8C/23 Group has 1 Mbyte of address space from

address 00000h to FFFFFh.

The internal ROM (program ROM) is allocated lower addresses, beginning with address 0FFFFh. For example, a

48-Kbyte internal ROM 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 is allocated higher addresses, beginning with address 00400h. For example, a 2.5-Kbyte

internal RAM is allocated addresses 00400h to 00DFFh. 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 (SFR) are allocated addresses 00000h to 002FFh and 01300h to 0147Fh (SFR area for

CAN). The peripheral function control registers are allocated them. All addresses within the SFR, which have

nothing allocated are reserved for future use and cannot be accessed by users.

Figure 3.2 Memory Map of R8C/23 Group

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer•oscillation stop detection•voltage detection

Address break

(Reserved)

Reset

FFFFFh

0FFFFh

0YYYYh

0XXXXh

00400h

002FFh

00000h

Internal ROM

(program ROM)

Internal RAM

SFR

(Refer to 4. Special

Function Registers

(SFRs))

0FFFFh

0FFDCh

02BFFh

02400h

Internal ROM

(data flash)

(1)

Reserved area

(2)

01300h

02000h

Internal ROM

(4)

(program ROM)

ZZZZZh

NOTES:

1. Data flash block A (1 Kbyte) and B (1 Kbyte) are shown.

2. SFR area for CAN is allocated addresses 01300h to 0147Fh.

3. The blank regions are reserved. Do not access locations in these regions.

4. Do not use addresses 20000h to 23FFFh because these areas are used for the emulator debugger. Refer to 24. Notes on

Emulator Debugger.

Part Number

Internal ROM

Size Address 0YYYYh Address ZZZZZh

R5F21236DFP, R5F21236JFP, R5F21236KFP

R5F21237DFP, R5F21237JFP, R5F21237KFP

R5F21238DFP, R5F21238JFP, R5F21238KFP

R5F2123AJFP, R5F2123AKFP

R5F2123CJFP, R5F2123CKFP

32 Kbytes

48 Kbytes

64 Kbytes

96 Kbytes

128 Kbytes

08000h

04000h

13FFFh

1BFFFh

23FFFh

Internal RAM

Address 0XXXXh

00BFFh

00DFFh

00FFFh

2 Kbytes

2.5 Kbytes

3 Kbytes

5 Kbytes

6 Kbytes

Size

Address 0SSSSh

037FFh

03BFFh

Internal RAM

03000h

0SSSSh

R8C/22 Group, R8C/23 Group 4. Special Function Registers (SFRs)

Rev.2.00 Aug 20, 2008 Page 15 of 48

REJ03B0097-0200

4. Special Function Registers (SFRs)

An SFR (special function register) is a control register for a peripheral function.

Table 4.1 to Table 4.13 list the SFR Information.

Table 4.1 SFR Information (1)

(1)

X: Undefined

NOTES:

1. The blank regions are reserved. Do not access locations in these regions.

2. Software reset, watchdog timer reset, and voltage monitor 2 reset do not affect this register.

3. The LVD0ON bit in the OFS register is set to 1.

4. Power-on reset, voltage monitor 1 reset or the LVD0ON bit in the OFS register is set to 0.

5. Software reset, watchdog timer reset, and voltage monitor 2 reset do not affect b2 and b3.

6. Software reset, watchdog timer reset, and voltage monitor 2 reset do not affect b7.

7. Software reset, the watchdog timer rest, and the voltage monitor 2 reset do not affect other than the b0 and b6.

8. The CSPROINI bit in the OFS register is 0.

Address Register Symbol After reset

0000h

0001h

0002h

0003h

0004h Processor Mode Register 0 PM0 00h

0005h Processor Mode Register 1 PM1 00h

0006h System Clock Control Register 0 CM0 01101000b

0007h System Clock Control Register 1 CM1 00100000b

0008h

0009h

000Ah Protect Register PRCR 00h

000Bh

000Ch Oscillation Stop Detection Register OCD 00000100b

000Dh Watchdog Timer Reset Register WDTR XXh

000Eh Watchdog Timer Start Register WDTS XXh

000Fh Watchdog Timer Control Register WDC 00X11111b

0010h Address Match Interrupt Register 0 RMAD0 00h

0011h 00h

0012h 00h

0013h Address Match Interrupt Enable Register AIER 00h

0014h Address Match Interrupt Register 1 RMAD1 00h

0015h 00h

0016h 00h

0017h

0018h

0019h

001Ah

001Bh

001Ch Count Source Protect Mode Register CSPR 00h

10000000b

(8)

001Dh

001Eh

001Fh

0020h

0021h

0022h

0023h High-Speed On-Chip Oscillator Control Register 0 FRA0 00h

0024h High-Speed On-Chip Oscillator Control Register 1 FRA1 When shipping

0025h High-Speed On-Chip Oscillator Control Register 2 FRA2 00h

0026h

0030h

0031h

Voltage Detection Register 1

(2)

VCA1 00001000b

0032h

Voltage Detection Register 2

(6)

VCA2

00h

(3)

01000000b

(4)

0033h

0034h

0035h

0036h

Voltage Monitor 1 Circuit Control Register

(7)

VW1C

0000X000b

(3)

0100X001b

(4)

0037h

Voltage Monitor 2 Circuit Control Register

(5)

VW2C 00h

0038h

0039h

003Fh

R8C/22 Group, R8C/23 Group 4. Special Function Registers (SFRs)

Rev.2.00 Aug 20, 2008 Page 16 of 48

REJ03B0097-0200

Table 4.2 SFR Information (2)

(1)

X: Undefined

NOTES:

1. The blank regions are reserved. Do not access locations in these regions.

2. Selected by the IICSEL bit in the PMR register.

Address Register Symbol After reset

0040h

0041h

0042h

0043h CAN0 Wake Up Interrupt Control Register C01WKIC XXXXX000b

0044h CAN0 Successful Reception Interrupt Control Register C0RECIC XXXXX000b

0045h CAN0 Successful Transmission Interrupt Control Register C0TRMIC XXXXX000b

0046h CAN0 State/Error Interrupt Control Register C01ERRIC XXXXX000b

0047h

0048h Timer RD0 Interrupt Control Register TRD0IC XXXXX000b

0049h Timer RD1 Interrupt Control Register TRD1IC XXXXX000b

004Ah Timer RE Interrupt Control Register TREIC XXXXX000b

004Bh

004Ch

004Dh Key Input Interrupt Control Register KUPIC XXXXX000b

004Eh A/D Conversion Interrupt Control Register ADIC XXXXX000b

004Fh

SSU Interrupt Control Register/IIC Bus Interrupt Control Register

(2)

SSUIC/IICIC XXXXX000b

0050h

0051h UART0 Transmit Interrupt Control Register S0TIC XXXXX000b

0052h UART0 Receive Interrupt Control Register S0RIC XXXXX000b

0053h UART1 Transmit Interrupt Control Register S1TIC XXXXX000b

0054h UART1 Receive Interrupt Control Register S1RIC XXXXX000b

0055h INT2 Interrupt Control Register INT2IC XX00X000b

0056h Timer RA Interrupt Control Register TRAIC XXXXX000b

0057h

0058h Timer RB Interrupt Control Register TRBIC XXXXX000b

0059h INT1 Interrupt Control Register INT1IC XX00X000b

005Ah INT3 Interrupt Control Register INT3IC XX00X000b

005Bh

005Ch

005Dh INT0 Interrupt Control Register INT0IC XX00X000b

005Eh

005Fh

0060h

0061h

0062h

0063h

0064h

0065h

0066h

0067h

0068h

0069h

006Ah

006Bh

006Ch

006Dh

006Eh

006Fh

0070h

0071h

0072h

0073h

0074h

0075h

0076h

0077h

0078h

0079h

007Ah

007Bh

007Ch

007Dh

007Eh

007Fh

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P36 P37-P39 P40-P42 P43-P45 P46-P48 P49-P51 P52-P54

R5F21237KFP#U1

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16-bit Microcontrollers - MCU MCU 3/5V 48+2K -40/125C AU PbFree 48LQFP

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