R8C/11 Group 5. Electrical Characteristics
Rev.1.60 Jan 27, 2006 page 17 of 26
REJ03B0034-0160
Figure 5.3 Reset Circuit Electrical Characteristics
V
por1
V
cc min
V
det
(3)
V
det
(3)
t
w(por1)
t
w(Vpor1–Vdet)
Sampling time
(1, 2)
Internal reset signal
(“L” effective)
f
RING-S
1
X 32
f
RING-S
1
X 32
V
por2
NOTES:
1. Hold the voltage of the microcomputer operation voltage range (Vccmin or above) within sampling time.
2. A sampling clock is selectable. Refer to “5.4 Voltage Detection Circuit” of Hardware Manual for details.
3. V
det
shows the voltage detection level of the voltage detection circuit. Refer to “5.4 Voltage Detection Circuit” for details.
4. Refer to “Table 16.6 Reset Circuit Electrical Characteristics” for electrical characteristics.
t
w(por2)
t
w(Vpor2 –Vdet)
Table 5.6
Reset Circuit Electrical Characteristics (When Using Hardware Reset 2
(1, 3)
)
S
y
m
b
o
l
Standard
T
y
p
.
U
n
i
t
M
e
a
s
u
r
i
n
g
c
o
n
d
i
t
i
o
n
M
i
n
.M
a
x
.
P
a
r
a
m
e
t
e
r
V
p
o
r
2
P
o
w
e
r
-
o
n
r
e
s
e
t
v
a
l
i
d
v
o
l
t
a
g
e
VV
d
e
t
N
O
T
E
S
:
1
.
T
h
e
v
o
l
t
a
g
e
d
e
t
e
c
t
i
o
n
c
i
r
c
u
i
t
w
h
i
c
h
i
s
e
m
b
e
d
d
e
d
i
n
a
m
i
c
r
o
c
o
m
p
u
t
e
r
i
s
a
f
a
c
t
o
r
t
o
g
e
n
e
r
a
t
e
t
h
e
h
a
r
d
w
a
r
e
r
e
s
e
t
2
.
R
e
f
e
r
t
o
5
.
1
.
2
H
a
r
d
w
a
r
e
R
e
s
e
t
2
o
f
H
a
r
d
w
a
r
e
M
a
n
u
a
l
f
o
r
d
e
t
a
i
l
s
.
2
.
T
h
i
s
c
o
n
d
i
t
i
o
n
i
s
n
o
t
a
p
p
l
i
c
a
b
l
e
w
h
e
n
u
s
i
n
g
w
i
t
h
V
c
c
≥
1
.
0
V
.
3
.
W
h
e
n
t
u
r
n
i
n
g
p
o
w
e
r
o
n
a
f
t
e
r
t
h
e
e
x
t
e
r
n
a
l
p
o
w
e
r
h
a
s
b
e
e
n
h
e
l
d
b
e
l
o
w
t
h
e
v
a
l
i
d
v
o
l
t
a
g
e
(
V
p
o
r
1
)
f
o
r
g
r
e
a
t
e
r
t
h
a
n
1
0
s
e
c
o
n
d
s
,
r
e
f
e
r
t
o
T
a
b
l
e
5
.
7
R
e
s
e
t
C
i
r
c
u
i
t
E
l
e
c
t
r
i
c
a
l
C
h
a
r
a
c
t
e
r
i
s
t
i
c
s
(
W
h
e
n
N
o
t
U
s
i
n
g
H
a
r
d
w
a
r
e
R
e
s
e
t
2
)
.
4
.
t
w
(
p
o
r
2
)
i
s
t
i
m
e
t
o
h
o
l
d
t
h
e
e
x
t
e
r
n
a
l
p
o
w
e
r
b
e
l
o
w
e
f
f
e
c
t
i
v
e
v
o
l
t
a
g
e
(
V
p
o
r
2
)
.
S
u
p
p
l
y
v
o
l
t
a
g
e
r
i
s
i
n
g
t
i
m
e
w
h
e
n
p
o
w
e
r
-
o
n
r
e
s
e
t
i
s
c
a
n
c
e
l
e
d
(2
)
t
W
(
V
p
o
r
2
-
V
d
e
t
)
ms
1
0
0
2
0
°
C
≤
T
o
p
r
<
8
5
°
C
2
0
°
C
≤
T
o
p
r
<
8
5
°
C
,
t
W
(
p
o
r
2
)
≥
0
s
(4
)
Table 5.7
Reset Circuit Electrical Characteristics (When Not Using Hardware Reset 2)
S
y
m
b
o
l
S
t
a
n
d
a
r
d
T
y
p
.
U
n
i
t
Measuring condition
M
i
n
.M
a
x
.
P
a
r
a
m
e
t
e
r
0.1
N
O
T
E
S
:
1
.
W
h
e
n
n
o
t
u
s
i
n
g
h
a
r
d
w
a
r
e
r
e
s
e
t
2
,
u
s
e
w
i
t
h
V
c
c
≥
2
.
7
V
.
2
.
t
w
(
p
o
r
1
)
i
s
t
i
m
e
t
o
h
o
l
d
t
h
e
e
x
t
e
r
n
a
l
p
o
w
e
r
b
e
l
o
w
e
f
f
e
c
t
i
v
e
v
o
l
t
a
g
e
(
V
p
o
r
1
)
.
100
1
t
W
(
V
p
o
r
1
-
V
d
e
t
)
S
u
p
p
l
y
v
o
l
t
a
g
e
r
i
s
i
n
g
t
i
m
e
w
h
e
n
p
o
w
e
r
-
o
n
r
e
s
e
t
i
s
c
a
n
c
e
l
e
d
0.5
t
W
(
V
p
o
r
1
-
V
d
e
t
)
Supply voltage rising time when power-on reset is canceled
t
W
(
V
p
o
r
1
-
V
d
e
t
)
S
u
p
p
l
y
v
o
l
t
a
g
e
r
i
s
i
n
g
t
i
m
e
w
h
e
n
p
o
w
e
r
-
o
n
r
e
s
e
t
i
s
c
a
n
c
e
l
e
d
V
V
p
o
r
1
P
o
w
e
r
-
o
n
r
e
s
e
t
v
a
l
i
d
v
o
l
t
a
g
e
m
s
ms
m
s
tW(Vpor1-
Vdet)
S
u
p
p
l
y
v
o
l
t
a
g
e
r
i
s
i
n
g
t
i
m
e
w
h
e
n
p
o
w
e
r
-
o
n
r
e
s
e
t
i
s
c
a
n
c
e
l
e
d 100
m
s
0
°
C
≤
T
o
p
r
≤
8
5
°
C
,
t
W
(
p
o
r
1
)
≥
1
0
s
(2
)
2
0
°
C
≤
T
o
p
r
<
0
°
C
,
t
W
(
p
o
r
1
)
≥
1
0
s
(2
)
0
°
C
≤
T
o
p
r
≤
8
5
°
C
,
t
W
(
p
o
r
1
)
≥
1
s
(2
)
2
0
°
C
≤
T
o
p
r
<
8
5
°
C
2
0
°
C
≤
T
o
p
r
<
0
°
C
,
t
W
(
p
o
r
1
)
≥
3
0
s
(2
)
