R8C26 datasheet(19/75 Pages) RENESAS

19 / 75 page

R8C/26 Group, R8C/27 Group

4. Special Function Registers (SFRs)

Rev.2.10

Sep 26, 2008

Page 17 of 69

REJ03B0168-0210

Special Function Registers (SFRs)

An SFR (special function register) is a control register for a peripheral function. Tables 4.1 to 4.7 list the special

function registers.

Table 4.1

SFR Information (1)(1)

X: Undefined

NOTES:

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

2. The CSPROINI bit in the OFS register is set to 0.

3. In J, K version these regions are reserved. Do not access locations in these regions.

Address

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 Protection Mode Register

CSPR

00h

10000000b(2)

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

0027h

0028h

Clock Prescaler Reset Flag

CPSRF

00h

0029h

High-Speed On-Chip Oscillator Control Register 4(3)

FRA4

When shipping

002Ah

002Bh

High-Speed On-Chip Oscillator Control Register 6(3)

FRA6

When shipping

002Ch

High-Speed On-Chip Oscillator Control Register 7(3)

FRA7

When shipping

002Dh

002Eh

002Fh

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