Preliminary document
Specifications in this document are tentative and subject to change.
Under development
R8C/34W Group, R8C/34X Group, R8C/34Y Group, R8C/34Z Group
4. Special Function Registers (SFRs)
4. Special Function Registers (SFRs)
An SFR (special function register) is a control register for a peripheral function. Tables 4.1 to 4.17 list the special
function registers. Table 4.18 lists the ID Code Areas and Option Function Select Area.
(1)
Table 4.1
SFR Information (1)
Address
0000h
0001h
0002h
0003h
0004h
0005h
0006h
0007h
0008h
0009h
000Ah
000Bh
000Ch
000Dh
000Eh
000Fh
0010h
0011h
0012h
0013h
0014h
0015h
0016h
0017h
0018h
0019h
001Ah
001Bh
001Ch
Register
Symbol
After reset
Processor Mode Register 0
Processor Mode Register 1
PM0
PM1
CM0
CM1
00h
00h
System Clock Control Register 0
System Clock Control Register 1
Module Standby Control Register
System Clock Control Register 3
Protect Register
Reset Source Determination Register
Oscillation Stop Detection Register
Watchdog Timer Reset Register
Watchdog Timer Start Register
Watchdog Timer Control Register
00101000b
00100000b
00h
MSTCR
CM3
PRCR
RSTFR
OCD
WDTR
WDTS
WDTC
00h
00h
0XXXXXXXb (2)
00000100b
XXh
XXh
00111111b
High-Speed On-Chip Oscillator Control Register 7
FRA7
CSPR
When shipping
Count Source Protection Mode Register
00h
10000000b (3)
001Dh
001Eh
001Fh
0020h
0021h
0022h
0023h
0024h
0025h
0026h
0027h
0028h
0029h
002Ah
002Bh
002Ch
002Dh
002Eh
002Fh
0030h
0031h
0032h
0033h
0034h
High-Speed On-Chip Oscillator Control Register 0
High-Speed On-Chip Oscillator Control Register 1
High-Speed On-Chip Oscillator Control Register 2
On-Chip Reference Voltage Control Register
FRA0
FRA1
FRA2
OCVREFCR
00h
When shipping
00h
00h
High-Speed On-Chip Oscillator Control Register 4
High-Speed On-Chip Oscillator Control Register 5
High-Speed On-Chip Oscillator Control Register 6
FRA4
FRA5
FRA6
When Shipping
When Shipping
When Shipping
High-Speed On-Chip Oscillator Control Register 3
Voltage Monitor Circuit Control Register
Voltage Monitor Circuit Edge Select Register
FRA3
CMPA
VCAC
When shipping
00h
00h
Voltage Detect Register 1
Voltage Detect Register 2
VCA1
VCA2
00001000b
00h (4)
00100000b (5)
0035h
0036h
0037h
0038h
Voltage Detection 1 Level Select Register
Voltage Monitor 0 Circuit Control Register
Voltage Monitor 1 Circuit Control Register
VD1LS
VW0C
VW1C
00000111b
1100X010b (4)
1100X011b (5)
10001010b
0039h
X: Undefined
Notes:
1. The blank areas are reserved and cannot be accessed by users.
2. The CWR bit in the RSTFR register is set to 0 after power-on and voltage monitor 0 reset. Hardware reset, Software reset, or watchdog timer
reset does not affect this bit.
3. The CSPROINI bit in the OFS register is set to 0.
4. The LVDAS bit in the OFS register is set to 1.
5. The LVDAS bit in the OFS register is set to 0.
REJ03B0312-0010 Rev.0.10
Apr 09, 2010
Page 27 of 67
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