Known issues
Known issue: Connecting Fusion 7" display causes system to wake from suspend mode
ConnectCore 6UL SBC Pro Hardware Reference Manual
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Known issue: Connecting Fusion 7" display causes system to
wake from suspend mode
The LCD interface in the ConnectCore 6UL SBC Pro causes the system to wake up from suspend mode
when the Fusion 7" display is connected.
Affected versions/models
This issue is related to a population option that affects the first kits and prototypes of the
ConnectCore 6UL SBC Pro, meaning
any board revision prior to revA
.
To check the board version of your SBC Pro, look for the part number in the label as shown in the
following photo.
The board shown in the photo is a 2P revision, which precedes revA and therefore exhibits the issue
described in this section.
Description
Two pull-up resistors (R78 and R168) are placed in the interrupt line of the LCD interface (LCD_IRQ_N)
that goes to both the LCD and the LVDS connectors. The interrupt line of the touch controller in the
Fusion 7" display is rising-edge active and should not be driven by the carrier board. When going to
suspend to RAM mode, the LCD_IRQ_N line must be kept low in order to avoid waking the system up.
