R8C/M11A Group, R8C/M12A Group

4. Electrical Characteristics

Specifications in this document are tentative and subject to change.

R01DS0010EJ0010 Rev.0.10

Page 29 of 45

Aug 25, 2010

Notes:

1. The measurement condition is Vcc = 1.8 V to 5.5 V and Topr = -20

°C to 85 °C (N version)/-40 °C to 85 °C (D version).

2. Select the voltage detection level with bits VDSEL0 and VDSEL1 in the OFS register.

3. The response time is from when the voltage passes Vdet0 until the voltage monitor 0 reset is generated.

4. The wait time is necessary for the voltage detection circuit to operate when the VC0E bit in the VCA2 register is set to 0 and

then 1.

Notes:

1. The measurement condition is Vcc = 1.8 V to 5.5 V and Topr = -20

°C to 85 °C (N version)/-40 °C to 85 °C (D version).

2. Select the voltage detection level with bits VD1S1 to VD1S3 in the VD1LS register.

3. The response time is from when the voltage passes Vdet1 until the voltage monitor 1 interrupt request is generated.

4. The wait time is necessary for the voltage detection circuit to operate when the VC1E bit in the VCA2 register is set to 0 and

then 1.

Table 4.7

Voltage Detection 0 Circuit Electrical Characteristics

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

Voltage detection level Vdet0_0 (2)

1.80

1.90

2.05

V

Voltage detection level Vdet0_1 (2)

2.15

2.35

2.50

V

Voltage detection level Vdet0_2 (2)

2.70

2.85

3.05

V

Voltage detection level Vdet0_3 (2)

3.55

3.80

4.05

V

—

Voltage detection 0 circuit response time (3)

When Vcc decreases from 5 V

to (Vdet0_0 - 0.1) V

—30—

µs

—

Self power consumption in voltage detection

circuit

VC0E = 1, Vcc = 5.0 V

—

1.5

—

µA

Wait time until voltage detection circuit

operation starts (4)

—

—

100

µs

Table 4.8

Voltage Detection 1 Circuit Electrical Characteristics

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

Voltage detection level Vdet1_1 (2)

When Vcc decreases

2.15

2.35

2.55

V

Voltage detection level Vdet1_3 (2)

When Vcc decreases

2.45

2.65

2.85

V

Voltage detection level Vdet1_5 (2)

When Vcc decreases

2.75

2.95

3.15

V

Voltage detection level Vdet1_7 (2)

When Vcc decreases

3.00

3.25

3.55

V

Voltage detection level Vdet1_9 (2)

When Vcc decreases

3.30

3.55

3.85

V

Voltage detection level Vdet1_B (2)

When Vcc decreases

3.60

3.85

4.15

V

Voltage detection level Vdet1_D (2)

When Vcc decreases

3.90

4.15

4.45

V

Voltage detection level Vdet1_F (2)

When Vcc decreases

4.20

4.45

4.75

V

—

Hysteresis width at the rising of Vcc in

voltage detection 1 circuit

Vdet1_1 to Vdet1_5 selected

—

0.07

—

V

Vdet1_7 to Vdet1_F selected

—

0.10

—

V

—

Voltage detection 1 circuit response time (3)

When Vcc decreases from 5 V

to (Vdet1_0 - 0.1) V

—

60

150

µs

—

Self power consumption in voltage detection

circuit

VC1E = 1, Vcc = 5.0 V

—

1.7

—

µA

Wait time until voltage detection circuit

operation starts (4)

—

—

100

µs