Kontron COMe Starterkit Eval T2 - Manual (Page 139)

COM Express Interfaces
Figure 55: General Purpose I/O Loop-back Schematic
There are 4 GPI (General Purpose Inputs) and 4 GPO (General Purpose Outputs) pins in Figure 55 above.
The signals drive switch inputs such as Lamps, Relays, and Sensors.
GPI signals from a header are shown with protection diodes. The signals are connected for input to the COM Express Module.
GPO signals from the COM Express Module are shown buffered. The signals are connected to the header with protection diodes.
PICMG ® COM Express ® Carrier Board Design Guide Draft Rev. 2.0 / December 6, 2013 139/218
GPI3_UNBUF
GPI2_UNBUF
GPI1_UNBUF
GPI0_UNBUF
GPO0_B
GPO1_B
GPO2_B
GPO3_B
VCC_3V3
VCC_3V3
CEX GPI0
CEX GPI1
CEX GPI2
CEX GPI3
GPO0
GPO1
GPO2
GPO3
D108
BAT54S
D108
BAT54S
D101
BAT54S
D101
BAT54S D105
BAT54S
D105
BAT54S
D104
BAT54S
D104
BAT54S
C200
10n / 50V
C200
10n / 50V
D106
BAT54S
D106
BAT54S
D102
BAT54S
D102
BAT54S
U26
74LVC244A
U26
A1
2
A2
4
A3
6
A4
8
1OE
1
Y1
18
Y2
16
Y3
14
Y4
12
VCC
20
GND
10
A5
11
A6
13
A7
15
A8
17
Y5
9
Y6
7
Y7
5
Y8
3
2OE
19
D103
BAT54S
D103
BAT54S
F7
SMDC075 - 750mA
F7
SMDC075 - 750mA
D107
BAT54S
D107
BAT54S
J37
CON_5x2
J37
I/O1
1
I/O2
2
I/O3
3
I/O4
4
I/O5
5
I/O6
6
I/O7
7
I/O8
8
I/O9
9
I/O10
10
VCC_3V3 VCC_3V3 VCC_3V3 VCC_3V3
VCC_3V3 VCC_3V3 VCC_3V3 VCC_3V3
CEX
CEX
CEX
CEX