EnhancedIO<1,2,3,4> Input/Output Ports
This digital non-isolated bidirectional port is a singled-ended I/O port. Take note of the following characteristic when configuring the I/O port.
- When configured as input, it behaves like a 5V tolerant TTL compatible input, a 4K7 pull-up to +5V ensure logic '1' when unconnected.
- When configured as output, it behaves like a powerful TTL driver capable to supply large currents.
- It is configured as an input during the board initialization phase.
The port is protected against electrostatic discharges and is equipped with HF noise filter.
DC characteristic when I/O port is configured as INPUT
Parameter |
Min |
Typ |
Max |
Unit |
Input voltage range |
0 |
|
5 |
V |
Logic-0 input level |
0 |
|
0.8 |
V |
Logic-1 input level |
2.0 |
|
5.0 |
V |
Input impedance – Pull-up resistor |
|
4.7 |
|
kΩ |
DC characteristic when I/O port is configured as OUTPUT
Parameter |
Min |
Typ |
Max |
Unit |
Output voltage range |
0 |
|
5 |
V |
Logic-0 output level at lol = 8 mA |
|
|
0.4 |
V |
Logic-0 output level at lol = 16 mA |
|
|
0.8 |
V |
Logic-1 output level at loh = -3 mA |
3.0 |
|
|
V |
Logic-1 output level at loh = -24 mA |
1.5 |
|
|
V |
Output Mode
In the following schematic, the output pin corresponds to the EnhancedIO1, EnhancedIO2, EnhancedIO3 or EnhancedIO4 signals.
Equivalent schematic in output mode
Input Mode
In the following schematic, the input pin corresponds to the EnhancedIO1, EnhancedIO2, EnhancedIO3 or EnhancedIO4 signals.
Equivalent schematic in input mode