Rev. 6.00, 08/04, page 509 of 628
Table 16. 31 Power Supply Voltage Detection Circuit Characteristics (5)
Using external reference voltage and detect voltage external input (VREFSEL = VINTDSEL =
VINTUSEL = 1)
Rated Values
Item
Symbol
Min
Typ
Max
Unit
Test Condition
Comparator detection
accuracy
Vcdl
0.1
—
—
V
| VextU – Vref |
| VextD – Vref |
–0.3
—
V
CC
+ 0.3 or
AV
CC
+ 0.3,
whichever is
lower
V
V
CC
= 2.7 to 3.3 V
extD/extU pin input
voltage
VextD
*
VextU
*
–0.3
—
3.6 or AV
CC
+ 0.3, whichever
is lower
V
V
CC
= 3.3 to 5.5 V
Vref pin input voltage
Vref5
0.8
—
2.8
V
V
CC
= 2.7 to 5.5 V
Note:
*
The VextD voltage must always be greater than the VextU voltage.
16.8.8
Power-On Reset Circuit Characteristics
Table 16.32
Power-On Reset Circuit Characteristics
V
CC
= 2.7 V to 5.5 V, AV
CC
= 2.7 V to 5.5 V, V
SS
= AV
SS
= 0.0 V, unless otherwise specified
Rated Values
Item
Symbol Min
Typ
Max
Unit
Test Condition
RES pin pull-up
resistance
R
RES
65
100
—
k
Ω
Power-on reset start
voltage
V
por
—
—
100
mV
Note:
Make sure to drop the power supply voltage, V
CC
, to below Vpor = 100 mV and then raise it
after the RES pin load had thoroughly dissipated. To drain the load of the RES pin,
attaching a diode to the V
CC
side is recommended. The power-on reset function may not
work properly if the power supply voltage, V
CC
, is raised from a level exceeding 100 mV.
Содержание H8/38024 Series
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