Power Supply Voltage Detection Circuit Characteristics - Renesas H8 Series Hardware Manual

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
= 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.
Section 16 Electrical Characteristics
= 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
Rev. 7.00 Mar 10, 2005 page 525 of 652
Test Conditions
Unit
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
REJ09B0042-0700