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R8C/18 Group, R8C/19 Group
Table 18.8
Reset Circuit Electrical Characteristics (When Using Voltage Monitor 1 Reset)
Symbol
V
Power-on reset valid voltage
por2
t
Supply voltage rising time when power-on reset is
w(Vpor2-Vdet1)
deasserted
NOTES:
1. This condition is not applicable when using with Vcc ≥ 1.0 V.
2. When turning power on after the time to hold the external power below effective voltage (V
18.9 Reset Circuit Electrical Characteristics (When Not Using Voltage Monitor 1 Reset) .
3. t
is the time to hold the external power below effective voltage (V
w(por2)
Table 18.9
Reset Circuit Electrical Characteristics (When Not Using Voltage Monitor 1 Reset)
Symbol
V
Power-on reset valid voltage
por1
t
Supply voltage rising time when power-on reset is
w(Vpor1-Vdet1)
deasserted
t
Supply voltage rising time when power-on reset is
w(Vpor1-Vdet1)
deasserted
t
Supply voltage rising time when power-on reset is
w(Vpor1-Vdet1)
deasserted
t
Supply voltage rising time when power-on reset is
w(Vpor1-Vdet1)
deasserted
NOTES:
1. When not using voltage monitor 1, use with Vcc ≥ 2.7 V.
2. t
is the time to hold the external power below effective voltage (V
w(por1)
(3)
V
det1
V
por1
t
w(por1)
Internal
reset signal
("L" valid)
NOTES:
1. Hold the voltage inside the MCU operation voltage range (Vccmin or above) within the sampling time.
2. The sampling clock can be selected. Refer to 7. Voltage Detection Circuit for details.
3. V
indicates the voltage detection level of the voltage detection 1 circuit. Refer to 7. Voltage Detection Circuit for details.
det1
Figure 18.3
Reset Circuit Electrical Characteristics
Rev.1.30
Apr 14, 2006
REJ09B0222-0130
Parameter
(1)
Parameter
t
w(Vpor1–Vdet1)
1
f
RING-S
Page 207 of 233
Condition
-20 ° C ≤ Topr ≤ 85 ° C
-20 ° C ≤ Topr ≤ 85 ° C,
≥ 0s
(3)
t
w(por2)
).
por2
Condition
-20 ° C ≤ Topr ≤ 85 ° C
0 ° C ≤ Topr ≤ 85 ° C,
≥ 10 s
t
w(por1)
-20 ° C ≤ Topr < 0 ° C,
≥ 30 s
t
w(por1)
-20 ° C ≤ Topr < 0 ° C,
≥ 10 s
t
w(por1)
0 ° C ≤ Topr ≤ 85 ° C,
≥ 1 s
t
w(por1)
).
por1
(1, 2)
Sampling time
t
w(por2)
× 32
18. Electrical Characteristics
Standard
Min.
Typ.
Max.
−
−
V
−
−
) exceeds10 s, refer to Table
por1
Standard
Min.
Typ.
−
−
−
−
(2)
−
−
(2)
−
−
(2)
−
−
(2)
(3)
V
det1
Vccmin
V
por2
t
w(Vpor2–Vdet1)
1
× 32
f
RING-S
Unit
V
det1
100
ms
Unit
Max.
0.1
V
100
ms
100
ms
1
ms
0.5
ms
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