Registers; Voltage Monitor 2 Control Register (Vw2C) - Renesas M16C/64A Series User Manual

M16C/64A Group
15.2

Registers

Table 15.2 Registers
Address
002Ch Voltage Monitor 2 Control Register
037Ch Count Source Protection Mode Register
037Dh Watchdog Timer Refresh Register
037Eh Watchdog Timer Start Register
037Fh Watchdog Timer Control Register
Note:
1. When the CSPROINI bit in the OFS1 address is 0, the reset value becomes 1000 0000b.
15.2.1

Voltage Monitor 2 Control Register (VW2C)

Voltage Monitor 2 Control Register
b7 b6 b5 b4 b3 b2 b1
Set the PRC3 bit in the PRCR register to 1 (write enabled) before rewriting the VW2C register.
Bits VW2C2 and VW2C3 do not change at voltage monitor 1 reset, voltage monitor 2 reset, oscillator
stop detect reset, watchdog timer reset, or software reset.
When rewriting the VW2C register (excluding the VW2C3 bit), the VW2C2 bit may become 1. Set the
VW2C2 bit to 0 after rewriting the VW2C register.
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
Register
b0
Symbol
VW2C
Bit Symbol Bit Name
Voltage monitor 2 interrupt/
VW2C0
reset enable bit
Voltage monitor 2 digital filter
VW2C1
disable mode select bit
Voltage change detection
VW2C2
flag
Watchdog timer detection
VW2C3
flag
VW2F0
Sampling clock select bit
VW2F1
Voltage monitor 2 mode
VW2C6
select bit
Voltage monitor 2 interrupt/
VW2C7
reset generation condition
select bit
Symbol
VW2C
CSPR
WDTR
WDTS
WDC
Address
002Ch
0 : Disabled
1 : Enabled
0 : Digital filter enabled
1 : Digital filter disabled
0 : Not detected
1 : Vdet2 passage detected
0 : Not detected
1 : Watchdog timer underflow detected
b5 b4
0 0 : fOCO-S divided by 1
0 1 : fOCO-S divided by 2
1 0 : fOCO-S divided by 4
1 1 : fOCO-S divided by 8
0 : Voltage monitor 2 interrupt at Vdet2 passage
1 : Voltage monitor 2 reset at Vdet2 passage
0: When VCC1 reaches or goes above
Vdet2
1: When VCC1 reaches or goes below
Vdet2
15. Watchdog Timer
Reset Value
1000 0X10b
(1)
00h
XXh
XXh
00XX XXXXb
Reset Value
1000 0X10b
Function
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