Power Input Connectors (Atx1 And Cn18); Internal Usb 3.2 Gen1 (5Gbps) Connector (Cn20 And Cn21) - AXIOMTEK IMB540 User Manual

2.3.18

Power Input Connectors (ATX1 and CN18)

Steady and sufficient power can be supplied to all components on the motherboard by
connecting the power connector. Please make sure all components and devices are
properly installed before connecting the power connector.
An external power supply plug fits into ATX1 and CN18 in only one orientation. Properly
press down power supply plug until it completely and firmly fits into the connector. Loose
connection may cause system instability.
ATX1 CPU power input connector:
Pin ATX1 Signal
1 GND
2 GND
3 GND
4 GND
CN18 24-pin power input connector:
Pin CN19 Signal
1 3.3V
2 3.3V
3 GND
4 +5V
5 GND
6 +5V
7 GND
8 PWR OK
9 5VSB
10 +12V
11 +12V
12 3.3V
2.3.19 Internal USB 3.2 Gen1 (5Gbps) Connector (CN20 and
CN21)
The CN20 & CN21 is a 19-pin internal connector for installing various USB 3.2
Gen1(5Gbps) compliant peripherals.
Pin Signal
1 VBUS0
2 SSRX5-
3 SSRX5+
4 GND
5 SSTX5-
6 SSTX5+
7 GND
8 USB10-
9 USB10+
10 ID
Board and Pin Assignments
Pin ATX1 Signal
5 +12V
6 +12V
7 +12V
8 +12V
Pin CN19 Signal
13 3.3V
14 -12V
15 GND
16 PS_ON
17 GND
18 GND
19 GND
20 -5V
21 +5V
22 +5V
23 +5V
24 GND
Pin Signal
19 VBUS1
18 SSRX6-
17 SSRX6+
16 GND
15 SSTX6-
14 SSTX6+
13 GND
12 USB11-
11 USB11+
IMB540 User's manual
5 1
4
8
24
12
13
1
17