© Microhard Systems Inc.
98
4.0 Configuration
Name
Description
Parameter
Min.
Typ.
Max
Units
I/O 1 - 8
(Input)
Input low state voltage
range
VIL
-0.5
0
1.2
V
Input high state voltage
range
VIH
1.5
3.3
30
V
Input leakage current
(3.3 VDC IN)
IIN
—-
58
—-
µA
Typical application input source is a dry switch contact to ground.
Pin includes an internal 56K
Ω resistor pull up to 3.3 VDC.
I/O 1 - 8
(Output)
Open drain drive to
ground
Idc
—-
100
110
mA
Maximum open circuit
voltage applied
Voc
—-
3.3
30
V
Typical application is to drive a relay coil to ground.
Table 4-9-1: Digital I/O Specifications