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CET0m10
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5.2
Power Supply Connectors
The conga-MEVAL provides the following connectors for power supply:
•
standard 24-pin ATX conector (X59)
•
12 V DC banana jack (M22 and M23)
•
optional DC banana jack for supplying power to the module (M29 and M30)
Note
In ATX mode, the +3.3 V, +5 V and +12 V are derived from the ATX power supply. If 12 V DC power is supplied via the DC banana jack, the
onboard DC/DC regulators will generate 3.3 V and 5 V.
Caution
1. Do not exceed the voltage rating of the COM Express module. Doing so will damage the module.
2. Do not supply power to both the DC banana jack and the ATX connector at the same time.
5.2.1
Standard ATX Connector
The conga-MEVAL provides a 24-pin ATX connector (X59). Use jumper X58 to select ATX or AT power supply mode. Use jumper X60 to
disconnect the 5 V standby voltage from the whole system.
The conga-MEVAL also provides a 4-pin ATX connector (X128). This connector can be used together with connector X59 if higher current is
expected.
Table 4
X58 - ATX PSU Control Description
Pin
Configuration
Description
1-2
ATX mode (default)
Module starts after pressing power-on button M19
2-3
AT mode
Module starts after switching on the power supply
Table 5
X60 - ATX 5V Standby Connection
Pin
Description
1-2
5V standby connected (default)
2-3
5V standby disconnected
2
3
1
X58
M19
2
3
1
X60