Power-Supply-Voltage Detection Circuit Characteristics; Lvdi External Voltage Detection Circuit Characteristics; Table 20.8 Power-Supply-Voltage Detection Circuit Characteristics; Table 20.9 Lvdi External Voltage Detection Circuit Characteristics - Renesas H8 Series Hardware Manual

20.2.6

Power-Supply-Voltage Detection Circuit Characteristics

Table 20.8 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.
20.2.7

LVDI External Voltage Detection Circuit Characteristics

Table 20.9 LVDI External Voltage Detection Circuit Characteristics

Vcc = 4.5 to 5.5 V, AVcc = 3.0 to 5.5 V, V
Item
ExtD/ExtU input
detection voltage
ExtD/ExtU input voltage
range
Test
Symbol Condition
Vint(D) LVDSEL = 0
Vint(U) LVDSEL = 0
1
Vreset1 LVDSEL = 0
2
Vreset2 LVDSEL = 1
V
LVDRmin
t
LVDON
I LVDE = 1,
STBY
BGRE = 1
Vcc = 5.0 V
= 0.0 V, T
SS
Test
Symbol Condition
Vexd
VextD/U VextD > VextU
Section 20 Electrical Characteristics
Values
Min. Typ.
3.3 3.7
3.6 4.0
2.0 2.3
3.0 3.6
1.0 —
50 —

—
= 1.0 V and then rises, a reset
LVDRmin
= –20 to +75°C
a
Values
Min. Typ. Max.
0.85 1.15 1.45
−0.3
— Lower voltage,
either AVcc + 0.3
or Vcc + 0.3
Rev. 3.00 Sep. 14, 2006 Page 327 of 408
Max. Unit
4.3 V
4.5 V
2.7 V
4.2 V
— V
µs
—
µA
350
Unit
V
V
REJ09B0105-0300