NVIDIA Jetson TX2/TX2i OEM Product Design Guide
JETSON TX2/TX2i OEM PRODUCT | DESIGN GUIDE | 20180618 74
5. eMMC boot does not use either the normal boot mode or alternate boot mode supported by the eMMC spec. The Tegra
BootROM uses the Card Identification mode for booting from eMMC.
6. Tegra UART4_TX & UART4_RTS_N are routed to a mux on Jetson TX2 and directed to either UART3_TX/RTS or On-module WLAN/BT.
Since these pins are outputs, and the mux is in the path, Jetson TX2 UART3 pins will not affect the Boot Select [1:0] strapping. On Jetson
TX2i, the Tegra UART4 pins are routed directly to the UART3 pins on the module. If these pins are used in a design, they must not
be driven or pulled high during power-on as this would affect the BOOT_SELECT strapping. Violating this requirement
will likely prevent the system from booting.
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