Allwinner A20 User Manual download pdf (Page 13)

PWR_BUT – used to perform software turn off, software turn on; used to turn on board when

RESET – used for hardware reset of the board – it is not recommended

RECOVERY – used to wake up the board from sleep

The following buttons represent functions in the Android (it is possible that not all Android

applications take advantage of the buttons, in such case the button would serve no purpose for that

application):

VOL+ – increases the volume

VOL- – lowers the volume

MENU – brings up the main menu

SEARCH – brings up search feature

HOME – shows the home screen; note that HOME is also used to enter bootloader mode for

firmware update

ESC – used to navigate away of a menu

ENTER – to select a choice

It is not recommended to disconnect the power supply (either the USB or the power jack) before

turning off the Android from the either the menus or by holding PWR_BUT system written on the

NAND.

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Allwinner A20 User Manual Page 13