R8C/2G Group

5. Electrical Characteristics

Rev.1.00

Apr 04, 2008

Page 26 of 41

REJ03B0223-0100

NOTES:

1.

−20 to 85°C (N version) / −40 to 85°C (D version).

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.

NOTES:

1.

−20 to 85°C (N version) / −40 to 85°C (D version).

2.

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.

4.

This parameter shows the voltage detection level when the power supply drops.

The voltage detection level when the power supply rises is higher than the voltage detection level when the power supply

drops by approximately 0.1 V.

NOTES:

1.

−20 to 85°C (N version) / −40 to 85°C (D version).

2.

3.

Necessary time until the voltage detection circuit operates after setting to 1 again after setting the VCA27 bit in the VCA2

register to 0.

Table 5.4

Voltage Detection 0 Circuit Electrical Characteristics

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

Voltage detection level

2.2

2.3

2.4

V

−

Voltage detection circuit self power consumption

−

0.9

−µA

Waiting time until voltage detection circuit operation

starts(2)

−−

300

µs

Vccmin

MCU operating voltage minimum value

2.2

−−

V

Table 5.5

Voltage Detection 1 Circuit Electrical Characteristics

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

Voltage detection level(4)

2.70

2.85

3.00

V

−

Voltage monitor 1 interrupt request generation time(2)

−

40

−µs

−

Voltage detection circuit self power consumption

−

0.6

−µA

Waiting time until voltage detection circuit operation

starts(3)

−−

100

µs

Table 5.6

Voltage Detection 2 Circuit Electrical Characteristics

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

Voltage detection level

3.3

3.6

3.9

V

−

Voltage monitor 2 interrupt request generation time(2)

−

40

−µs

−

Voltage detection circuit self power consumption

−

0.6

−µA

Waiting time until voltage detection circuit operation

starts(3)

−−

100

µs