M16C65 Datasheet, PDF (115/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
7.2.3 Voltage Monitor Function Select Register (VWCE)
7. Voltage Detector
Voltage Monitor Function Select Register
b7 b6 b5 b4 b3 b2 b1 b0
0000000
Symbol
VWCE
Address
0026h
Bit Symbol
Bit Name
After Reset
00h (hardware reset,
power-on reset, voltage monitor 0 reset,
voltage monitor 1 reset, voltage monitor 2 reset)
Function
RW
VW12E
Voltage detection 1, 2 circuit 0 : Voltage detection 1 and 2 circuits disabled
enable bit
1 : Voltage detection 1 and 2 circuits enabled
RW
—
(b7-b1)
Reserved bits
Set to 0
RW
Set the PCR3 bit in the PRCR register to 1 (write enabled) before the VWCE register is rewritten.
This register does not change at watchdog timer reset, oscillation stop detection reset, or software
reset.
VW12E Bit
Set the VW12E bit to 1 (enabled) when either or both of bits VC26 and VC27 in the VCR2 register are 1
(enabled).
7.2.4 Voltage Detection 1 Level Select Register (VD1LS)
Voltage Detection 1 Level Select Register
b7 b6 b5 b4 b3 b2 b1 b0
0000
Symbol
VD1LS
Bit Symbol
Address
0028h
Bit Name
After Reset
0000 1010b (Hardware reset, power-on reset, voltage
monitor 0 reset, voltage monitor 1 reset,
voltage monitor 2 reset)
Function
RW
VD1LS0
RW
VD1LS1
Vdet1 Select Bit
VD1LS2
VD1LS3
b3 b2 b1 b0
RW
0 1 1 0 : 3.09 V (Vdet1_6)
1 0 1 1 : 3.84 V (Vdet1_B)
1 1 1 1 : 4.44 V (Vdet1_F)
RW
Do not set values other than the above
RW
—
(b7-b4)
Reserved bits
Set to 0.
—
Set the PCR3 bit in the PRCR register to 1 (write enabled) before the VD1LS register is rewritten.
This register does not change at watchdog timer reset, oscillation stop detection reset, or software
reset.
The value of the VD1LS register is affected by the VW12E bit in the VWCE register. Table 7.3 lists
Value of the VD1LS Register. When setting the VW12E bit to 0 and then 1 after setting a value to the
VD1LS register, the setting value to the VD1LS register is returned.
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 80 of 791