About the development board Jumpers
ConnectCore for i.MX51 Hardware Reference Manual
72
LED 2, J9
When set, enables the User LED 2 (LE49) to show the status of this signal (on if low).
Button 1, J28
When set, enables the User Button 1 (S3).
Button 2, J29
When set, enables the User Button 2 (S5).
UART3 / XBee selection, J30 and J31
The UART 3 port is shared on the development board between the XBee module socket and the UART
3 connector (X19).
When J30 and J31 are set to positions 1-2, the XBee module socket can be used.
When J30 and J31 are set to positions 2-3, the UART 3 on the connector (X19) can be used.
WLAN disable, J17
When set, this jumper disables the WLAN interface on the module.
Touch selection, J20
When set, an external SPI touch screen controller is configured for the LCD 1 interface and the internal
analog touch screen controller (on module) is configured for the LCD 2 interface.
When removed, an internal touch screen controller is configured for the LCD 2 interface, and the
internal analog touch screen controller (on module) is configured for the LCD 1 interface.
Coincell enable, J3
When set, this jumper supplies the real time clock with +3V from the lithium coin cell battery, even if
the board is switched off.
JTAG mod., J4
When set, this jumper disables the JTAG interface for the ConnectCore for i.MX51.
When removed, the JTAG interface is enabled.
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