R8C/3GD Group

5. Electrical Characteristics

REJ03B0289-0100 Rev.1.00

Feb 26, 2010

Page 27 of 41

Notes:

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.

Notes:

2. To use the power-on reset function, enable voltage monitor 0 reset by setting the LVDAS bit in the OFS register to 0.

Figure 5.3

Power-on Reset Circuit Electrical Characteristics

Table 5.8

Voltage Detection 2 Circuit Electrical Characteristics

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

Voltage detection level Vdet2_0

3.70

4.00

4.30

V

Hysteresis width at the rising of Vcc in voltage detection

2 circuit

0.10

V

Voltage detection 2 circuit response time (2)

At the falling of Vcc from

5 V to (Vdet2_0

0.1) V

20

150

s

Voltage detection circuit self power consumption

1.7

A

Waiting time until voltage detection circuit operation

starts (3)

100

s

Table 5.9

Power-on Reset Circuit (2)

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

(1)

0

50000

mV/msec

Notes:

Circuit of Hardware Manual (REJ09B0518) for details.

a power-on reset. When turning on the power after it falls with voltage monitor 0 reset enabled, maintain

0.5 V

Internal

reset signal

Voltage detection 0

circuit response time

1

32

1

32

External