DFI AL551, Quick Reference

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DFI reserves the right to change the specifications at any time prior to the
product's release. This QR may be based on editions that do not resemble your
actual products. For more documentation and drivers, please visit the download
page at go.dfi.com/AL551 , or via the QR code to the right.
Front Audio
Pin Assignment Pin Assignment
1 Mic-L 2 GND
3 Mic-R 4 N.C.
5 Line-R 6 Mic-JD
7 GND 8 ---
9 Line-L 10 Line-JD
SMBus
Pin Assignment Pin Assignment
1 3V3SB 2 GND
3 SMB_CLK 4 SMB_DATA
5 SMB_ALERT 6 GND
EIO
Pin Assignment Pin Assignment
1 P 2 P
3 PCIE_RX0- 4 PCIE_TX0-
5 GND 6 GND
7 P 8 P
9 PCIE_RX1- 10 PCIE_TX1-
11 GND 12 GND
13 P 14 N.C.
15 PCIE_CLK- 16 N.C.
17 GND 18 GND
19 US 20 N.C.
21 USB_SSRX0- 22 N.C.
23 GND 24 GND
25 US 26 N.C.
27 USB_SSTX0- 28 N.C.
29 GND 30 N.C.
31 S 32 N.C.
33 SATA0_RX- 34 GND
35 GND 36 PCIE_WAKE
37 S 38 N.C.
39 SATA0_TX- 40 N.C.
41 GND 42 SMB_STB_CK
43 DDI0_CTRL 44 SMB_STB_DAT
45 DDI0_CTRLCLK_AUX- 46 GND
47 GND 48 CLK33M
49 DDI 50 LPC_AD0
51 DDI0_PAIR0- 52 LPC_AD1
Pin Assignment Pin Assignment
53 GND 54 LPC_AD2
55 DDI 56 LPC_AD3
57 DDI0_PAIR1- 58 LPC_SERIRQ
59 GND 60 LPC_FRAME#
61 DDI 62 DDI0_HPD
63 DDI0_PAIR2- 64 DDI0_AUX_Detect
65 GND 66 GND
67 DDI 68 GPIO_STB (INT)
69 DDI0_PAIR3- 70 PLT_RESET#
71 GND 72 N.C.
73 3V3SB_1 74 N.C.
75 3V3SB_2 76 PS_ON
77 AUD_GND 78 Line-JD
79 Line1_L 80 Line1-R
83 GND 84 GND
85 GND 86 GND
87 5VSB 88 5VSB
89 5VSB 90 5VSB
Extension I/O
(EIO)
2 80
1 79
SMBus
1 5
2
1
9
2
10
Front
Audio
4 Quick Reference | AL551