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R8C/18 Group, R8C/19 Group
4.
Special Function Registers (SFRs)
An SFR (special function register) is a control register for a peripheral function. Tables 4.1 to 4.4 list the
special function registers.
Table 4.1
SFR Information (1)
Address
0000h
0001h
0002h
0003h
0004h
Processor Mode Register 0
0005h
Processor Mode Register 1
0006h
System Clock Control Register 0
0007h
System Clock Control Register 1
0008h
0009h
Address Match Interrupt Enable Register
000Ah
Protect Register
000Bh
000Ch
Oscillation Stop Detection Register
000Dh
Watchdog Timer Reset Register
000Eh
Watchdog Timer Start Register
000Fh
Watchdog Timer Control Register
0010h
Address Match Interrupt Register 0
0011h
0012h
0013h
0014h
Address Match Interrupt Register 1
0015h
0016h
0017h
0018h
0019h
001Ah
001Bh
001Ch
Count Source Protection Mode Register
001Dh
001Eh
INT0 Input Filter Select Register
001Fh
0020h
High-Speed On-Chip Oscillator Control Register 0
0021h
High-Speed On-Chip Oscillator Control Register 1
0022h
High-Speed On-Chip Oscillator Control Register 2
0023h
002Ah
002Bh
002Ch
002Dh
002Eh
002Fh
0030h
0031h
Voltage Detection Register 1
0032h
Voltage Detection Register 2
0033h
0034h
0035h
0036h
Voltage Monitor 1 Circuit Control Register
0037h
Voltage Monitor 2 Circuit Control Register
0038h
0039h
003Ah
003Bh
003Ch
003Dh
003Eh
003Fh
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. After hardware reset.
4. After power-on reset or voltage monitor 1 reset.
5. Software reset, watchdog timer reset, and voltage monitor 2 reset do not affect b2 and b3.
Rev.1.30
Apr 14, 2006
REJ09B0222-0130
(1)
Register
(2)
(2)
(2)
(5)
Page 18 of 233
4. Special Function Registers (SFRs)
Symbol
After reset
PM0
00h
PM1
00h
CM0
01101000b
CM1
00100000b
AIER
00h
PRCR
00h
OCD
00000100b
WDTR
XXh
WDTS
XXh
WDC
00011111b
RMAD0
00h
00h
X0h
RMAD1
00h
00h
X0h
CSPR
00h
INT0F
00h
HRA0
00h
HRA1
When shipping
HRA2
00h
VCA1
00001000b
VCA2
(3)
00h
01000000b
VW1C
0000X000b
0100X001b
VW2C
00h
(4)
(3)
(4)
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