Seco Qseven Q7-974 User Manual page 35

Rel. 2.0 comliant module with the intel bay trail family system-on-chips

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3.2.3.8

LVDS Flat Panel signals

The Intel

Atom E38xx family of SOCs offer two multi-purpose Digital Display Interfaces, which allow the implementation of HDMI/DVI, Display Port (DP) or

embedded Display Port (eDP).

The LVDS interface, which is frequently used in many application fields, is not directly supported by the SoC.

For this reason, considering that LVDS interface can be multiplexed on the same pin with the eDP interface, on Q7-974 module can be implemented an eDP to

LVDS bridge (NXP PTN3460), which allow the implementation of a Dual Channel LVDS, with a maximum supported resolution of 1920x1200 @ 60Hx (dual channel

mode). Such an interface is derived from Intel

Please remember that LVDS interface is not native for E38xx family of SOCs, it is derived from an optional eDP-to-LVDS bridge. Depending on the

factory option purchased, on the same pins it is possible to have available LVDS or eDP interface.

Please take care of specifying if it is necessary LVDS interface or eDP, before placing an order of Q7-974 module.

Here following the signals related to LVDS management:

LVDS_A0+/LVDS_A0-: LVDS Primary Channel #0 differential data pair #0.

LVDS_A1+/LVDS_A1-: LVDS Primary Channel #0 differential data pair #1.

LVDS_A2+/LVDS_A2-: LVDS Primary Channel #0 differential data pair #2.

LVDS_A3+/LVDS_A3-: LVDS Primary Channel #0 differential data pair #3.

LVDS_A_CLK+/LVDS_A_CLK-: LVDS Primary Channel #0 differential clock.

LVDS_B0+/LVDS_B0-: LVDS Secondary Channel #0 differential data pair #0.

LVDS_B1+/LVDS_B1-: LVDS Secondary Channel #0 differential data pair #1.

LVDS_B2+/LVDS_B2-: LVDS Secondary Channel #0 differential data pair #2.

LVDS_B3+/LVDS_B3-: LVDS Secondary Channel #0 differential data pair #3.

LVDS_B_CLK+/LVDS_B_CLK-: LVDS Secondary Channel differential Clock

LVDS_PPEN: +3.3V_S electrical level Output, Panel Power Enable signal. It can be used to turn On/Off the connected LVDS display.

LVDS_BLEN: +3.3V_S electrical level Output, Panel Backlight Enable signal. It can be used to turn On/Off the backlight's lamps of connected LVDS display.

LVDS_BLT_CTRL: this signal can be used to adjust the panel backlight brightness in displays supporting Pulse Width Modulated (PWM) regulations.

LVDS_DID_DAT: DisplayID DDC Data line for LVDS flat Panel detection. Bidirectional signal, electrical level +3.3V_S with a 2k2Ω pull-up resistor.

LVDS_DID_CLK: DisplayID DDC Clock line for LVDS flat Panel detection. Bidirectional signal, electrical level +3.3V_S with a 2k2Ω pull-up resistor.

Q7-974

Atom E38xx SOCs' Digital Display Interface #1.

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