LV-67R User’s Manual
-23-
2.4.9 <GPIO and Other interface>
When using GPIO function, please note:
As Output:
Open-drain
, most applications
need use an external pull up
resistor
.
(If not may cause damage)
As Input:
TTL-level
.
GPIO DC characteristics
5V TTL-level Input Pin
Parameter
Sym
Min
Typ Max
Unit Conditions
Input Low Threshold Voltage
V
t-
0.5
0.8
1.1
V
V
CC
= 3.3V
Input High Threshold Voltage
V
t+
1.6
2.0
2.4
V
V
CC
=3.3V
Hystersis
V
TH
0.5
1.2
V
V
CC
=3.3V
Input High Leakage
I
LIH
+10
μ
A
V
IN
= 3.3V
Input Low Leakage
I
LIL
-10
μ
A
V
IN
= 0V
Open-drain output pin with 12-mA sink capability
Output Low Voltage
V
OL
0.4
V
I
OL
= 12 mA
CPUFAN
4
1
5
1
CN_LPC
12
1
11
2
CN_DIO
12
1
11
2
CN_SMBUS
SYSFAN
4
1
AUXFAN
4
1
CN_PS2
10
9
2
1
