Atx Power Connector (Cn20); Pci-Express Mini Card (Usb) And Msata Connector (Scn1) - AXIOMTEK CAPA840 User Manual

2.4.16

ATX Power Connector (CN20)

Steady and sufficient power can be supplied to all components on the board by
connecting the power connector. Please make sure all components and devices are
properly installed before connecting the power connector.
The CN20 is a 4-pin power supply interface. External power supply plug fits into CN20 in
only one orientation. Properly press down power supply plug until it completely and
firmly fits into this connector. Loose connection may cause system instability.
Pin
1
2
3
4
2.4.17 PCI-Express Mini Card (USB) and mSATA Connector
(SCN1)
This is a PCI-Express Mini Card connector on the bottom side applying to only USB 2.0
and SATA (mSATA). It also complies with PCI-Express Mini Card Spec. V1.2.
Pin Signal
1 WAKE#
3 No use
5 No use
7 CLKREQ#
9 GND
11 REFCLK-
13 REFCLK+
15 GND
17 No use
19 No use
21 GND
23 SATA_RXP
25 SATA_RXN
27 GND
29 GND
31 SATA_TXN
33 SATA_TXP
35 GND
37 GND
39 +3.3VSB
41 +3.3VSB
43 GND
45 No use
47 No use
49 No use
51 No use
Board and Pin Assignments
Signal
GND
GND
+12V~+24V
+12V~+24V
Pin Signal
2 +3.3VSB
4 GND
6 +1.5V
8 No use
10 No use
12 No use
14 No use
16 No use
18 GND
20 W_DISABLE#
22 PERST#
24 +3.3VSB
26 GND
28 +1.5V
30 SMB_CLK
32 SMB_DATA
34 GND
36 USB #4_D-
38 USB #4_D+
40 GND
42 No use
44 No use
46 No use
48 +1.5V
50 GND
52 +3.3VSB
CAPA840/843 Capa Board
21