Copyright
©
2012
congatec
AG
CEVA_c_m10
14/47
The +3.3V and +5V used by some devices on the COM Express™ evaluation carrier board are generated onboard only if 12V DC input (M2,
M7) is used and ATX power connector not plugged in. Otherwise the vo3.3V and +5V are delivered by ATX power supply with voltage
regulators disabled.
The voltages used are the +3.3V and +5V. The ‑5V is not available and the ‑12V is not used.
The following table lists the pinout for connector X70.
Table 2
Connector X70 Pinout
Pin Signal
Description
Pin
Signal
Description
1
+3.3V
Power 3.3VDC
13
+3.3V
Power 3.3VDC
2
+3.3V
Power 3.3VDC
14
‑12V
Power Supply ‑12DC
3
GND
Power Ground
15
GND
Power Ground
4
+5V
Power 5VDC
16
PS_ON#
Power Supply On (active low). Short this pin to GND to switch
power supply ON, disconnect from GND to switch OFF.
5
GND
Power Ground
17
GND
Power Ground
6
+5V
Power 5VDC
18
GND
Power Ground
7
GND
Power Ground
19
GND
Power Ground
8
PWR_OK Power Ok: A status signal generated by the power supply
to notify the computer that the DC operating voltages are
within the ranges required for proper computer operation.
20
NC
9
5V_SB
Standby Power 5VDC
21
+5V
Power 5VDC
10
+12V
Power 12DC
22
+5V
Power 5VDC
11
+12V
Power 12DC
23
+5V
Power 5VDC
12
+3.3V
Power 3.3VDC
24
GND
Power Ground
ATX Power
X70
