Avalue Technology ESM-EHLC, User Manual, Page: 30 / 88

ESM-EHLC
User’s Manual
30 ESM-EHLC User
’s Manual
2.3.3.1 Signal Description
– COM Express Connector 2 (CN1B)
2.3.3.1.1 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.
2.3.3.1.2 DDI Signals
Signal Signal Description
DDI[1:3]_PAIR[0:3]+
DDI[1:3]_PAIR[0:3]-
Digital Display Interface 1 to 3Pair[0:3] differential pairs
DDI[1:3]_DDC_AUX_SEL
Selects the function of DDI[1:3]_CTRL 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]_CTRL
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