Under development
Preliminary specification
Specifications in this manual are tentative and subject to change.
R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,
R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group
6. Voltage Detection Circuit
VCC or LVCMP2
Vdet2
1.8 V
(1)
1
VW1C3 bit
0
Sampling clock of
digital filter
×
2 cycles
1
VW2C1 bit is set to 0
(digital filter enabled)
and
VCAC2 bit is set to 1
(both edges)
VW2C2 bit
0
Set to 0 by a program.
Set to 0 when an interrupt request
is acknowledged.
Sampling clock of
digital filter
×
2 cycles
Voltage monitor 2
interrupt request
VW2C1 bit is set to 0
(digital filter enabled),
VCAC2 bit is set to 0
(one edge),
and
VW2C7 bit is set to 0
(when VCC or LVCMP2
reaches Vdet2 or above)
1
VW2C2 bit
0
Voltage monitor 2
interrupt request
Set to 0 by a program.
Set to 0 when an interrupt request
is acknowledged.
VW2C1 bit is set to 0
(digital filter enabled),
VCAC2 bit is set to 0
(one edge),
and
VW2C7 bit is set to 1
(when VCC or LVCMP2
reaches Vdet2 or below)
1
VW2C2 bit
0
Voltage monitor 2
interrupt request
Set to 0 by a program.
Set to 0 when an interrupt request
is acknowledged.
Set to 0 by a program.
1
VW2C1 bit is set to 1
(digital filter disabled)
and
VCAC2 bit is set to 1
(both edges)
VW2C2 bit
0
Voltage monitor 2
interrupt request
Set to 0 when an interrupt request
is acknowledged.
Set to 0 by a program.
VW2C1 bit is set to 1
(digital filter disabled),
VCAC2 bit is set to 0
(one edge),
and
VW2C7 bit is set to 0
(when VCC or LVCMP2
reaches Vdet2 or above)
1
VW2C2 bit
0
Voltage monitor 2
interrupt request
Set to 0 when an interrupt request
is acknowledged.
VW2C1 bit is set to 1
(digital filter disabled),
VCAC2 bit is set to 0
(one edge),
and
VW2C7 bit is set to 1
(when VCC or LVCMP2
reaches Vdet2 or below)
1
VW2C2 bit
0
Voltage monitor 2
interrupt request
Set to 0 by a program.
Set to 0 when an interrupt request
is acknowledged.
VCA13: Bit in VCA1 register
VW2C1, VW2C2, VW2C3, VW2C7: Bits in VW2C register
VCAC2: Bit in VCAC register
The above applies under the following conditions:
• VCA27 bit in VCA2 register = 1 (voltage detection 2 circuit enabled)
• VW2C0 bit in VW2C register = 1 (voltage monitor 2 interrupt enabled)
Note:
1. When voltage monitor 0 reset is not used, set the power supply to VCC
≥
1.8 V.
Figure 6.7
Operating Example of Voltage Monitor 2 Interrupt
REJ09B0441-0010 Rev.0.10
Page 77 of 809
Jul 30, 2008
RENESAS [ RENESAS TECHNOLOGY CORP ]
