Datasheet
R01DS0011EJ0101 Rev.1.01 Page 59 of 102
Oct 28, 2011
R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group 5. Electrical Characteristics
Notes:
1. Select the voltage detection level with bits VDSEL0 and VDSEL1 in the OFS register.
2. Necessary time until the voltage detection circuit operates when setting to 1 again after setting the VCA25 bit in the VCA2 register to 0.
3. Time until the voltage monitor 0 reset is generated after the voltage passes Vdet0.
Notes:
1. Select the voltage detection level with bits VD1S0 to VD1S3 in the VD1LS register.
2. Time until the voltage monitor 1 interrupt request is generated after the voltage passes V
det1.
3. Necessary time until the voltage detection circuit operates when setting to 1 again after setting the VCA26 bit in the VCA2 register to 0.
Table 5.9 Voltage Detection 0 Circuit Characteristics
(V
CC = 1.8 to 5.5 V and Topr = −20 to 85 °C (N version)/ −40 to 85 °C (D version), unless
otherwise specified.)
Symbol Parameter Condition
Standard
Unit
Min. Typ. Max.
V
det0
Voltage detection level Vdet0_0
(1)
1.8 1.90 2.05 V
Voltage detection level Vdet0_1
(1)
2.15 2.35 2.50 V
Voltage detection level Vdet0_2
(1)
2.70 2.85 3.05 V
Voltage detection level Vdet0_3
(1)
3.55 3.80 4.05 V
– Voltage detection 0 circuit
response time
(3)
In operation At the falling of Vcc from 5 V
to (Vdet0_0
− 0.1) V
– 50 500
µs
In stop mode At the falling of Vcc from 5 V
to (Vdet0_0
− 0.1) V
– 100 500
µs
– Voltage detection circuit self power
consumption
VCA25 = 1, V
CC = 5.0 V – 1.5 – µA
t
d(E-A) Waiting time until voltage detection
circuit operation starts
(2)
– – 100 µs
Table 5.10 Voltage Detection 1 Circuit Characteristics
(V
CC = 1.8 to 5.5 V and Topr = −20 to 85 °C (N version)/ −40 to 85 °C (D version), unless
otherwise specified.)
Symbol Parameter Condition
Standard
Unit
Min. Typ. Max.
V
det1
Voltage detection level Vdet1_0
(1)
At the falling of VCC 2.00 2.20 2.40 V
Voltage detection level Vdet1_1
(1)
At the falling of VCC 2.15 2.35 2.55 V
Voltage detection level Vdet1_2
(1)
At the falling of VCC 2.30 2.50 2.70 V
Voltage detection level Vdet1_3
(1)
At the falling of VCC 2.45 2.65 2.85 V
Voltage detection level Vdet1_4
(1)
At the falling of VCC 2.60 2.80 3.00 V
Voltage detection level Vdet1_5
(1)
At the falling of VCC 2.75 2.95 3.15 V
Voltage detection level Vdet1_6
(1)
At the falling of VCC 2.85 3.10 3.40 V
Voltage detection level Vdet1_7
(1)
At the falling of VCC 3.00 3.25 3.55 V
Voltage detection level Vdet1_8
(1)
At the falling of VCC 3.15 3.40 3.70 V
Voltage detection level Vdet1_9
(1)
At the falling of VCC 3.30 3.55 3.85 V
Voltage detection level Vdet1_A
(1)
At the falling of VCC 3.45 3.70 4.00 V
Voltage detection level Vdet1_B
(1)
At the falling of VCC 3.60 3.85 4.15 V
Voltage detection level Vdet1_C
(1)
At the falling of VCC 3.75 4.00 4.30 V
Voltage detection level Vdet1_D
(1)
At the falling of VCC 3.90 4.15 4.45 V
Voltage detection level Vdet1_E
(1)
At the falling of VCC 4.05 4.30 4.60 V
Voltage detection level Vdet1_F
(1)
At the falling of VCC 4.20 4.45 4.75 V
– Hysteresis width at the rising of Vcc in
voltage detection 1 circuit
Vdet1_0 to Vdet1_5 selected – 0.07 – V
Vdet1_6 to Vdet1_F selected – 0.10 – V
– Voltage detection 1 circuit response
time
(2)
In operation At the falling of Vcc from
5 V to (Vdet1_0
− 0.1) V
– 60 150
µs
In stop mode At the falling of Vcc from
5 V to (Vdet1_0
− 0.1) V
– 250 500
µs
– Voltage detection circuit self power
consumption
VCA26 = 1, V
CC = 5.0 V – 1.7 – µA
t
d(E-A) Waiting time until voltage detection
circuit operation starts
(3)
– – 100 µs