Kontron EPIC/PM, User Manual

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17 16BGeneral Purpose I/O
Kontron User's Guide
EPIC/PM
48
17
17.1
General Purpose I/O
The EPIC/PM Board comes with 15 General Purpose Input/Outputs (GPIOs). Each pin is individually
configurable as an input or output. One pin is configurable as Interrupt output. All output pins have at
least 12mA drive strength. (See the connector table in Appendix E for detailed information on each pin).
Connector
The GPIOs are available on the 2mm grid 2 row connector X11 (16 pins). To find the location of the
Connector on the EPIC/PM board, please see the
Appendix E: Connector Layout chapter.
The following table shows the pin-out of the connector.
GPIO Pin
Connector
Top View
Pin GPIO
GP17
*(12tu)
1 2 GND
GP16
*(12tu)
3 4 GP26/INT
*(12t)
GP15
*(12tu)
5 6 GP25
*(12tu)
GP14
*(12tu)
7 8 GP24
*(12tu)
GP13
*(12tu)
9 10 GP23
*(12tu)
GP12
*(12tu)
11 12 GP22
*(24td)(1)
GP11
*(12tu)
13 14 GP21
*(24td) (1)
GP10
*(12tu)
15 16 GP20
*(24td) (1)
SMB_DATA 17 18 SMB_CLK
Notes: *(12t) TTL level bi-directional pin and open-drain output with 12mA sink capability
*(12tu) TTL level bi-directional pin with internal pull up resistor and open-drain output with 12mA sink
capability
*(24td) TTL level bi-directional pin with weak internal pull down resistor and 24mA source/sink capability
*(1) leave pin floating or pull low during reset. This pin must not be pulled high within 50ms after
PCIRESET# signal goes inactive.
All of these signals are not galvanically isolated from the board. To ensure that the EPIC/PM Board is
protected from electrical damage, implement external protection circuitry such as optocouplers at each
signal.
17.2 Programming
You cannot configure the GPIOs from the BIOS Setup utility.
The GPIO controller can be accessed on I2C address 30h for write operations and 31h for read
operations.