Power-Supply-Voltage Detection Circuit Characteristics; Lvdi External Voltage Detection Circuit Characteristics; Table 20.18 Power-Supply-Voltage Detection Circuit Characteristics; Table 20.19 Lvdi External Voltage Detection Circuit Characteristics - Renesas H8 Series Hardware Manual

Section 20 Electrical Characteristics
20.3.6

Power-Supply-Voltage Detection Circuit Characteristics

Table 20.18 Power-Supply-Voltage Detection Circuit Characteristics

V = 0.0 V, T = –20 to +75°C, unless otherwise indicated.
SS a
Item
Power-supply falling detection
voltage
Power-supply rising detection
voltage
Reset detection voltage 1*
Reset detection voltage 2*
Lower-limit voltage of LVDR
3
operation*
LVD stabilization time
Current consumption in standby
mode
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
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
Item
ExtD/ExtU input
detection voltage
ExtD/ExtU input voltage
range
Rev. 3.00 Sep. 14, 2006 Page 344 of 408
REJ09B0105-0300
Symbol
Vint(D)
Vint(U)
1
Vreset1
2
Vreset2
V
LVDRmin
t
LVDON
I
STBY
= 0.0 V, T
SS
Test
Symbol Condition
Vexd
VextD/U VextD > VextU
Test
Condition Min.
LVDSEL = 0 3.3
LVDSEL = 0 3.6
LVDSEL = 0 2.0
LVDSEL = 1 3.0
1.0
50

LVDE = 1,
BGRE = 1
Vcc = 5.0 V
= 1.0 V and then rises, a reset
LVDRmin
= –20 to +75°C
a
Values
Min. Typ.
0.85 1.15
−0.3
—
Values
Typ. Max. Unit
3.7 4.3 V
4.0 4.5 V
2.3 2.7 V
3.6 4.2 V
— — V
µs
— —
µA
— 350
Max. Unit
1.45 V
Lower voltage, V
either AVcc + 0.3
or Vcc + 0.3