Ethernet; Gpio; Boot Select - Congatec SMARC conga-SMX8-X User Manual

Smarc 2.0 module based on the nxp i.mx 8quadxplus, 8dualxplus, and 8dualx applications processors

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5.11

Ethernet

The conga-SMX8-X offers GBE[0:1] pins for two ethernet interfaces via two onboard Atheros AR8031 Physical Layers (PHYs). Both interfaces support

up to 10/100/1000 Mbps

Note

The conga-SMX8-X module variants with NXP i.MX 8DualX SoC only support 10/100 Mbps on the GBE1 pins.

5.12

The conga-SMX8-X offers GPIO[0:11] pins for twelve GPIOs as defined in the SMARC Hardware Specification 2.0.

The GPIO[7:9] pins are provided via a PCAL9538ABS GPIO expander with the I²C address 0x73.

The GPIO[10:11] pins are provided via a PCAL9538ABS GPIO expander with the I²C address 0x72.

5.13

BOOT_SEL[0:2]#

The conga-SMX8-X does not support boot source selection via input straps (BOOT_SEL[0:2]#) because it uses the Boot From Fuses mode.

The eFUSES are preset by congatec to load the bootloader (U-Boot) from the onboard SPI NOR flash memory (see section 6.3 "SPI NOR

Flash"). The OS boot device is defined via the U-Boot environment variables. For more information, refer to the conga-SMX8-X online software

documentation at https://wiki.congatec.com.

FORCE_RECOV#

Low on the FORCE_RECOV# pin enables the Serial Downloader mode. The program image can be downloaded over the USB0 port (see

section 5.9 "USB Interfaces").

and the IEEE 1588-2008 standard—also known as Precision Time Protocol (PTP) Version 2.

SX8Xm01

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