Kontron pITX-SP - Manual (Page 33)

KTD-S0002-I Page 28 Digital I/O Interface
p ITX-SP User's Guide
13 Digital I/O Interface
The pITX-SP features eight bidirectional I/O lines. All I/O lines are TTL tolerant. Inputs can be driven from
either +3.3V or +5V devices. This feature allows a mixed +3.3V / +5V system environment.
13.1 Electrical Specifications
Digital Inputs
Parameter Min. Typ. Max. Units
Input LOW voltage +0.8 V
Input HIGH voltage +1.7 +5.5 V
Input rate (direct access) 100 kHz
Digital Outputs
Parameter Min. Typ. Max. Units
Output LOW voltage +0.45 V
Output HIGH voltage +2.4 +3.3 V
Output LOW/HIGH current 16 mA
Switching rate (direct access) 100 kHz
13.2 Connector
The digital I/O interface is available through the connector J3202 (10 pins).
Hint: the bidirectional I/Os are not available before hardware revision 4.00 (PCB revision).
Header Pin Signal Name Function
1 VCC 1) Power +3.3V
2 GPIO4 Bidirectional I/O 4
3 GPIO0 Bidirectional I/O 0
4 GPIO5 Bidirectional I/O 5
5 GPIO1 Bidirectional I/O 1
6 GPIO6 Bidirectional I/O 6
7 GPIO2 Bidirectional I/O 2
8 GPIO7 Bidirectional I/O 7
9 GPIO3 Bidirectional I/O 3
1 2
9 10
10 GND Ground
Note: 1) To protect the external power lines of peripheral devices make sure that
- the wires have the right diameter to withstand the maximum available current.
- to enclosure of the peripheral device fulfills the fire-protecting conditions of IEC/EN 60950.