Renesas H8 Series Hardware Manual

Section 16 Electrical Characteristics
Rev. 7.00 Mar 10, 2005 page 525 of 652
REJ09B0042-0700
16.8.7 Power Supply Voltage Detection Circuit Characteristics
Table 16.27 Power Supply Voltage Detection Circuit Characteristics (1)
V
CC
= 2.7 V to 5.5 V, AV
CC
= 2.7 V to 5.5 V, V
SS
= AV
SS
= 0.0 V, unless otherwise specified
Rated Values
Item Symbol Min Typ Max Unit
Test Conditions
LVDR operation drop
voltage
*
V
LVDRmin
1.0——V
LVD stabilization time T
LVDON
150 — — µs
Standby mode current
consumption
I
STBY
— — 100 µA LVDE = 1
V
CC
= 5.0 V
32 oscillator not
used
Note: * In some cases no reset may occur if the power supply voltage, V
CC
, drops below
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)
Rated Values
Item Symbol Min Typ Max Unit Test Conditions
Power supply drop
detection voltage
Vint(D)
*
3
3.3 3.7 4.2 V LVDSEL = 0
Power supply rise
detection voltage
Vint(U)
*
3
3.6 4.0 4.5 V LVDSEL = 0
Reset detection voltage
1
*
1
Vreset1
*
3
2.0 2.3 2.7 V LVDSEL = 0
Reset detection voltage
2
*
2
Vreset2
*
3
2.7 3.3 3.9 V LVDSEL = 1
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
minimum values.

Renesas H8 Series Specifications

General

Brand	Renesas
Model	H8 Series
Category	Computer Hardware
Language	English