2.8.4

Device Tree Overlay

The adapters onboard EEPROM contains information that will automatically

configure the Raspberry Pi's device tree to enable the adapters required pins.

The device tree will automatically configure the following:

Pin

Configuration

Use

I/O

Initialized Value

Comments

GPIO04

Input

Sky_PWR_EN

I

Default

See Note 3

GPIO07

Input

EEPROM_WP

I

Default

See Note 3

GPIO14

ALT0

UART TXD

O

Default

GPIO15

ALT0

UART RXD

I

Default

GPIO16

ALT3

UART CTS

I

Default

GPIO17

ALT3

UART RTS

O

Default

GPIO18

Input

Sky_PWR_PG

I

Default

See Note 3

GPIO24

Input

Sky_On_Off

I

Default

See Note 3

GPIO25

Output

Sky_Reset

O

Down

GPIO27

Output

Sky_DTR

O

Down

*Note 3: This signal is configured as an input to allow the default hardware pullup/pulldowns on the adapter to

drive the signal. If users wish to manipulate these signals they will need to initialize the pin to their prefered

settings.

PN 1001465 rev 2

NimbeLink Corp. 2020. All Rights Reserved.

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