Avalue ESM-QM87 - Manual (Page 32)

ESM-QM87
32 ESM-QM87 Quick Installation Guide
2.4.3.1 Signal Description
– COM Express Connector 2 (CN1B)
2.4.3.1.1 USB3.0 Signals
Signal Signal Description
USB_SSTX[0:3]+
USB_SSTX[0:3]-
Additional transmit signal differential pairs for the SuperSpeed USB data path.
USB_SSRX[0:3]+
USB_SSRX[0:3]-
Additional receive signal differential pairs for the SuperSpeed USB data path.
2.4.3.1.2 PEG Signals
Signal Signal Description
PEG_TX[ 0:15]+
PEG_TX[ 0:15]-
PCI Express Graphics transmit differential paris.
PEG_RX[ 0:15]+
PEG_RX[ 0:15]-
PCI Express Graphics recevie differential paris.
PEG_LANE_RV#
PCI Express Graphics lane reversal input strap. Pull low on the Carrier board to
reverse lane order.
2.4.3.1.3 DDI Signals
Signal Signal Description
DDI[1:3]_PAIR[0:3]+
DDI[1:3]_PAIR [0:3]-
Digital Display Interface 1 to 3 Pair[0:3] differential pairs
DDI[1:3]_DDC_AUX_SEL
Selects the function of DDI[1:3]_CTRLCLK_AUX+ and DDI[1:3]_CTRLDATA_AUX-.
If this input is floating the AUX pair is used for the DP AUX+/- signals. If pulled-high
the AUX pair contains the CRTLCLK and CTRLDATA signals.
DDI[1:3]_CTRLCLK_AUX+
DP AUX+function if DDI[1:3]_DDC_AUX_SEL is no connect
HDMI/DVI 12C CTRLCLK if DDI[1:3]_DDC_AUX_SEL is pulled high
DDI[1:3]_CTRLDATA_AUX-
DP AUX-function if DDI[1:3]_DDC_AUX_SEL is no connect
HDMI/DVI 12C CTRLDATA if DDI[1:3]_DDC_AUX_SEL is pulled high
DDI[1:3]_HPD Digital Display Interface Hot-Plug Detect