Datasheet

Section 20 Electrical Characteristics
Rev. 3.00 Sep. 14, 2006 Page 344 of 408
REJ09B0105-0300
20.3.6 Power-Supply-Voltage Detection Circuit Characteristics
Table 20.18 Power-Supply-Voltage Detection Circuit Characteristics
V
SS
= 0.0 V, T
a
= –20 to +75°C, unless otherwise indicated.
Values
Item Symbol
Test
Condition
Min. Typ. Max. Unit
Power-supply falling detection
voltage
Vint(D) LVDSEL = 0 3.3 3.7 4.3 V
Power-supply rising detection
voltage
Vint(U) LVDSEL = 0 3.6 4.0 4.5 V
Reset detection voltage 1*
1
Vreset1 LVDSEL = 0 2.0 2.3 2.7 V
Reset detection voltage 2*
2
Vreset2 LVDSEL = 1 3.0 3.6 4.2 V
Lower-limit voltage of LVDR
operation*
3
V
LVDRmin
1.0 — — V
LVD stabilization time t
LVDON
50 — — µs
Current consumption in standby
mode
I
STBY
LVDE = 1,
BGRE = 1
Vcc = 5.0 V
 — 350 µA
Notes: 1. This voltage should be used when the falling and rising voltage detection function is
used.
2. Select the low-voltage reset 2 when only the low-voltage detection reset is used.
3. When the power-supply voltage (Vcc) falls below V
LVDRmin
= 1.0 V and then rises, a reset
may not occur. Therefore sufficient evaluation is required.
20.3.7 LVDI External Voltage Detection Circuit Characteristics
Table 20.19 LVDI External Voltage Detection Circuit Characteristics
Vcc = 4.5 to 5.5 V, AVcc = 2.7 to 5.5 V, V
SS
= 0.0 V, T
a
= –20 to +75°C
Values
Item Symbol
Test
Condition
Min. Typ. Max. Unit
ExtD/ExtU input
detection voltage
Vexd 0.85 1.15 1.45 V
ExtD/ExtU input voltage
range
VextD/U VextD > VextU −0.3 — Lower voltage,
either AVcc + 0.3
or Vcc + 0.3
V