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16.8.7
Power Supply Voltage Detection Circuit Characteristics
Table 16.27
Power Supply Voltage Detection Circuit Characteristics (1)
V
= 2.7 V to 5.5 V, AV
CC
Item
LVDR operation drop
voltage *
LVD stabilization time
Standby mode current
consumption
Note: * In some cases no reset may occur if the power supply voltage, V
VLVDRmin = 1.0 V and then rises, so thorough evaluation is called for.
Table 16. 28 Power Supply Voltage Detection Circuit Characteristics (2)
Using on-chip reference voltage and ladder resistor (VREFSEL = VINTDSEL = VINTUSEL = 0)
Item
Power supply drop
detection voltage
Power supply rise
detection voltage
Reset detection voltage
1
1 *
Reset detection voltage
2
2 *
Notes: 1. The above function should be used in conjunction with the voltage drop/rise detection
function.
2. Low-voltage detection reset should be selected for low-voltage detection reset only.
3. The values of Vint(D), Vint(U), Vreset1, and Vreset2 change relative to each other.
Example: If Vint(D) is the minimum value, Vint(U), Vreset1, and Vreset2 are also the
Rev. 6.00, 08/04, page 506 of 628
= 2.7 V to 5.5 V, V
CC
Symbol
Min
V
1.0
LVDRmin
T
150
LVDON
I
—
STBY
Symbol
Min
3
Vint(D) *
3.3
3
Vint(U) *
3.6
3
Vreset1 *
2.0
3
Vreset2 *
2.7
minimum values.
= AV
= 0.0 V, unless otherwise specified
SS
SS
Rated Values
Typ
Max
—
—
—
—
—
100
Rated Values
Typ
Max
3.7
4.2
4.0
4.5
2.3
2.7
3.3
3.9
Unit
Test Conditions
V
µs
µA
LVDE = 1
V
= 5.0 V
CC
32 oscillator not
used
, drops below
CC
Unit
Test Conditions
V
LVDSEL = 0
V
LVDSEL = 0
V
LVDSEL = 0
V
LVDSEL = 1
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