About the development board Switches and push-buttons
ConnectCore for i.MX51 Hardware Reference Manual
69
Switch Pin Function Comments
S6.2 On = Auto Power Down enabled
Off = Auto Power Down disabled
Auto Power Down is not supported on this
board. This signal is only accessible to permit
the user to completely disable the MEI interface
for using the signals for other purposes. To
disable the MEI interface, go into RS232 mode
(S6.1 = ON) and activate the Auto Power Down
feature
(S6.2 = ON) - be sure that no cable is connected
to connector X30.
S6.3 On = 2-wire interface (RS4xx)
Off = 4-wire interface (RS422)
S6.4 On = Termination ON
Off = No termination
UART 2 switch, S7
Use S7 to configure the line interface for serial port 2 (console):
Switch Pin Function Comments
S7.1 On = Power
save
Off = Normal
Operation
If there is a valid RS232 signal at receiver inputs the UART
will be in normal operation mode.
If there is not a valid RS232 signal at receiver inputs the
UART will be in shutdown mode.
S7.2 On =
Shutdown
Off = Normal
Operation
Shutdown is the highest priority functionality. If switch
S7.2 = ON, the UART 2 will be in shutdown mode
independently of the position of S7.1.
Boot configuration switches, S8 and S9
Use S8 to configure the source of the boot code when S9 is configures in internal boot, or to configure
the source of the serial download when S9 is configured in serial downloader.
SwitchPin Function Comments
S8.1 On = Boot
from
expansion
device
Off = Boot
from NAND
Flash
Applies only if switch S9 is configured in internal
boot mode
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