TC65 Terminal Hardware Interface Description
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TC65 Terminal_HD_V02.000b
Page 57 of 65
19.02.2007
5.7
Characteristics of the GPIOs
Table 33: Characteristics of the GPIOs
Function
Signal name
IO Signal form and level
Comment
General
Purpose
Input/Output
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8
GPIO9
GPIO10
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
R
O
≈
100
Ω
V
OL
max = 0.4V at I = 2mA
V
OH
min = 2.50V at I = -0.5mA
V
OH
max = 3.05V
V
IL
max = 0.8V
V
IH
min = 2.0V
V
IH
max = 3.05V
If unused keep pins with a
pull up or pull down
resistor while the GPIO is
set to input.
Alternatively GPIO10 can
be used as pulse counter.
5.8
Characteristics of the Pulse Counter
Table 34: Characteristics of the pulse counter
Function
Signal name
IO Signal form and level
Comment
Pulse
Counter
GPIO10 I
V
IL
max = 0.8V
V
IH
min = 2.0V
V
IH
max = 3.05V
pulse
~
|________|
~~~~~~~~~~~~~
|________|
~~~
|
≥
450µs |
≥
450µs |
slew rate
≤
1µs
Counter range = 0 … 1000
pulses per second