Renesas H8 Series Hardware Manual

Section 16 Electrical Characteristics
Rev. 7.00 Mar 10, 2005 page 528 of 652
REJ09B0042-0700
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
VV
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
VV
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 — kΩ
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.

Renesas H8 Series Specifications

General

Brand	Renesas
Model	H8 Series
Category	Computer Hardware
Language	English