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8.15. Slot Connectors (PCIe, miniPCIe, SIM-Card and M.2)
The mITX-SKL-H supports the following slot connectors:
1 xPCIe x16 (16-lane) PCI Express port (J4)
1 x miniPCIe or mSATA, USB 2.0 (J17)
1x SIM-card socket (J20)
1x optional M.2 (J18)
8.15.1. PCI-Express x16 Connector (J4)
The mITX-SKL-H supports PCI express x 16 via slot J4 and supports PEG Bifurcation. PEG Bifurcation enables the PCI
Express lanes to be divided into:
2x PCIe x8
1x PCIe x8 + 2x PCIe x4
For PEG Bifurcation to function a PCIe Riser Card with bifurcation is required.
The 16-lane (x16) PCI Express (J4) (PCIe 2.0 and PCIe 3.0) port can be used for external PCI Express cards inclusive
graphics card. The maximum theoretical bandwidth using 16 lanes is 16 GB/s.
Table 30: Pin Assignment PCIe (x16) Slot Connector (J4)
Side B Connector
Pin
Name
Description
1
+12V
2
+12V
3
+12V
4
GND
5
SMCLK
6
SMBDAT
7
GND
8
+3V3
9
NC
10
SB3V3
11
WAKE#
Mechanical Key
12
NC
13
GND
14
PEG_TXP[0]
15
PEG_TXN[0]
16
GND
17
CLKREQ
18
GND
19
PEG_TXP[1]
20
PEG_TXN[1]
+12 V power
+12 V power
+12 V power
Ground
SMBus clock
SMBus data
Ground
+3.3 V power
NC
3.3 V power
Link Reactivation
NC
Ground
Transmitter Lane 0,
Differential pair
Ground
Clock request
Ground
Transmitter Lane 1,
Differential pair
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Side A Connector
Name
Description
NC
NC
+12V
+12 V power
+12V
+12 V power
GND
Ground
NC
NC
NC
NC
NC
NC
NC
NC
+3V3
+3.3 V power
+3V3
+3.3 V power
RST#
Reset
GND
Ground
PCIE_x16CLK
Reference Clock
Differential pair
PCIE_x16 CLK#
GND
Ground
PEG_RXP[0]
Receiver Lane 0,
Differential pair
PEG_RXN[0]
GND
Ground
NC
NC
GND
Ground
mITX-SKL-H – User Guide, Rev.1.1
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