| DDIA_TX_P[3:0] DDIA_TX_N[3:0] | O | Digital Display Interface A (DDIA): Digital Display Interface main link transmitter lanes. |
| DDIA_AUX_P DDIA_AUX_N | I/O | Digital Display Interface A (DDIA): DisplayPort Auxiliary: Half-duplex, bidirectional channel consist of one differential pair. |
| GPP_SD12/DDSP_HPDA/DISP_MISCA1 (Option 1) | I | Digital Display Interface A (DDIA): Hot Plug Detect (HPD). |
| GPP_SA14/DDSP_HPDA/DISP_MISCA1 (Option 2) |
| GPP_SD09/VDDEN1 (Option 1) | O | Digital Display Interface A (DDIA): eDP Panel power control enable signal. |
| GPP_SA21/VDDEN1 (Option 2) |
| GPP_SD10/BKLTEN1 (Option 1) | O | Digital Display Interface A (DDIA): eDP Panel back-light control enable signal. |
| GPP_SA22/RSVD/BKLTEN1 (Option 2) |
| GPP_SD11/BKLTCTL1 (Option 1) | O | Digital Display Interface A (DDIA): eDP Panel back-light control Pulse Wide Modulation (PWM) signal. |
| GPP_SA23/RSVD/BKLTCTL1 (Option 2) |
| DDI2_TX_P[3:0] DDI2_TX_N[3:0] DDI3_TX_P[3:0] DDI3_TX_N[3:0] | O | Digital Display Interface x (DDIx): Digital Display Interface main link transmitter lanes. |
| DDI2_AUX_P DDI2_AUX_N DDI3_AUX_P DDI3_AUX_N | I/O | Digital Display Interface x (DDIx): DisplayPort Auxiliary: Half-duplex, bidirectional channel consist of one differential pair. |
| GPP_SB02/DDP2_CTRLCLK GPP_SB04/DDP3_CTRLCLK GPP_SB03/DDP2_CTRLDATA GPP_SB05/DDP3_CTRLDATA | I/O | Digital Display Interface x (DDIx): HDMI Graphics Management Bus (GMBUS). |
| GPP_SD15/DDSP_HPD1/DISP_MISC11 (Option 1) GPP_SD16/DDSP_HPD2/DISP_MISC21 (Option 1) GPP_SD13/DDSP_HPD3/DISP_MISC31 (Option 1) GPP_SD14/DDSP_HPD4/DISP_MISC41 (Option 1) GPP_SA17/DDSP_HPD1/DISP_MISC11 (Option 2) GPP_SA18/DDSP_HPD2/DISP_MISC21 (Option 2) GPP_SA15/DDSP_HPD3/DISP_MISC31 (Option 2) GPP_SA16/DDSP_HPD4/DISP_MISC41 (Option 2) | I | Digital Display Interface x (DDIx): Hot Plug Detect (HPD). |
| GPP_SD12/DDSP_HPDA/DISP_MISCA GPP_SD15/DDSP_HPD1/DISP_MISC1 GPP_SD16/DDSP_HPD2/DISP_MISC2 GPP_SD13/DDSP_HPD3/DISP_MISC3 GPP_SD14/DDSP_HPD4/DISP_MISC4 | O | DDI Misc signals. |
| GPP_SB00/ DDPA_CTRLCLK /SRCCLKREQ2# | I/O | (S-Processor only) Digital Display Interface x (DDIA): HDMI Graphics Management Bus (GMBUS). DDC CTRLCLK |
| GPP_SB01/ DDPA_CTRLDATA /SRCCLKREQ3# | I/O | (S-Processor only) Digital Display Interface x (DDIA): HDMI Graphics Management Bus (GMBUS). DDC CTRLDATA |
| DDI_RCOMP | Analog | (HX-Processor only) DDI IO Compensation resistors. |
- These signals are alternate signals with identical functionality, either Option 1 or Option 2 should be used.
- Auxiliary Channel (AUX CH) is a half-duplex bidirectional channel used for link management and device control. AUX CH is an AC coupled differential signal.
- GMBUS follows I2C Protocol.
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