2.4.5 Connect USB
Connect the USB cable to the SWDK2's J14 interface.
The J14 interface will connect to the modem's USB to serial UART interface IC to
access the modem's serial UART interface. The D3 LED will illuminate when USB is
connected.
2.4.6 Modem Power On
The development kit can automatically boot the modem when power is applied if the
automatic turn on circuit is enabled. Otherwise users should press the ON BTN to turn
the modem on. Most modems will turn on with a 1 second press and hold of the ON
BTN, but some modems, such as the TC4EU modem, may require 5 seconds. Please
refer to the modem's datasheet for details on its ON_OFF timing.
PN 1002634 REV 1
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