User's Manual l MBa8Xx UM 0100 l © 2020, TQ-Systems GmbH
Page 29
3.8.6.2
Dual channel LVDS / MIPI_DSI
Two separate LVDS interfaces are available on the MBa8Xx. The interfaces are provided by a combined transceiver from the
i.MX 8X, which outputs either MIPI-DSI or LVDS. The maximum possible resolutions depend on the type of transceiver. MIPI-DSI
supports 1920x1200 (WUXGA) at 60 fps, LVDS supports 1920x1080 (Full HD) at 60 fps. The LVDS signals are provided as Dual
Channel interface on connector X14.
On a second connector X22, various supply voltages (12 V, 5 V) as well as USB and configuration signals are available.
TUSB8041
TQMa8Xx
MIPI_DSI0
MIPI_DSI1
USB_OTG2
LVDS Header
(X14)
Optional at DisplayPort
Header (X23)
V_3V3_LVDS
LVDS Header
(X22)
V_5V_LVDS
V_12V V_5V
GPIO3_IOxx
Figure 14: Block diagram Dual-Channel LVDS
Note: Limited use of the DisplayPort interface
LVDS (X14) and the eDP / DisplayPort interface (X23) use the same LVDS lanes of the TQMa8Xx.
Due to the associated automatic signal termination in the eDP bridge, only one of the two interfaces
can be used at a time.
If the eDP / DisplayPort is not used, the eDP bridge must be deactivated by EN signal (by port
expander PCA9538A). This automatically deactivates the low impedance termination in the
SN65DSI86 and the LVDS interface (X14) can be used.
