R8C/2G Group

4. Special Function Registers (SFRs)

Rev.1.00

Apr 04, 2008

Page 12 of 41

REJ03B0223-0100

4.

Special Function Registers (SFRs)

An SFR (special function register) is a control register for a peripheral function. Tables 4.1 to 4.12 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.

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

01011000b

0007h

System Clock Control Register 1

CM1

00h

0008h

0009h

000Ah

Protect Register

PRCR

00h

000Bh

000Ch

System Clock Select 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

High-Speed On-Chip Oscillator Control Register 0

HRA0

00h

0021h

High-Speed On-Chip Oscillator Control Register 1

HRA1

When Shipping

0022h

High-Speed On-Chip Oscillator Control Register 2

HRA2

00h

0023h

0024h

0025h

0026h

0027h

0028h

Clock Prescaler Reset Flag

CPSRF

00h

0029h

High-Speed On-Chip Oscillator Control Register 4

FRA4

When Shipping

002Ah

002Bh

High-Speed On-Chip Oscillator Control Register 6

FRA6

When Shipping

002Ch

002Dh

002Eh

BGR Trimming Auxiliary Register A

BGRTRMA

When Shipping

002Fh

BGR Trimming Auxiliary Register B

BGRTRMB

When Shipping