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 H8/36912 Series User Manual

20.3.6

Power-Supply-Voltage Detection Circuit Characteristics

Table 20.18 Power-Supply-Voltage Detection Circuit Characteristics

V = 0.0 V, T
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
reset 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 = 3.0 to 5.5 V, V
Item
ExtD/ExtU input
detection voltage
ExtD/ExtU input voltage
range
Rev. 1.00, 11/03, page 320 of 376
Downloaded from Elcodis.com electronic components distributor
= –20 to +75°C, unless otherwise indicated.
Symbol
Vint(D)
Vint(U)
1
Vreset1
2
Vreset2
V
t
I
Test
Symbol Condition
Vexd
VextD/U VextD > VextU
Test
Condition
LVDSEL = 0 3.3
LVDSEL = 0 3.6
LVDSEL = 0 2.0
LVDSEL = 1 3.0
LVDRmin
LVDON
LVDE = 1,
STBY
BGRE = 1
Vcc = 5.0 V
= 0.0 V, T = –20 to +75°C
SS a
Min.
0.85
−0.3
Values
Min. Typ. Max.
3.7 4.2
4.0 4.5
2.3 2.7
3.6 4.2
1.0 — —
50 — —

— TBD
= 1.0 V and then rises, a
LVDRmin
Values
Typ. Max.
1.15 1.45
— Lower voltage,
either AVcc + 0.3
or Vcc + 0.3
Unit
V
V
V
V
V
µs
µA
Unit
V
V