<section begin="History" />

!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History

!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Version!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes

|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|X1.Y0.Z0|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Month YearDec 2020|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|TBDFirst Release

<section end="History" /><section begin="Body" />

The UARTs interface UART interfaces are available on the Evaluation Kit at the connector ''TBD:Jxxx''connectors J9 and J10.

J9 and J10 are 3 pin terminal blocks 5.0mm pitch respectively for USART3 and UART8. Can be independently used as RS232 or RS485 based on kit model. ''Jxx'' is a TODO:aggiungere link alla pagina di composizione P/N''TBD:connector-type'' header connector for the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console).

! latexfontsize="scriptsize"| Pin#! latexfontsize="scriptsize"| SOM Pin#! latexfontsize="scriptsize"| Pin nameRS232! latexfontsize="scriptsize"| Pin functionRS485! latexfontsize="scriptsize"| Pin Notes|-|1| J18.89| USART3_TX| RS485_A|

|1,2,4,6,,7,8,10| J18.91| USART3_RX| RS485_B| |-| 3

| N.A.Ground| N.C.Ground| Not connected|} ==== J10 ===={| class="wikitable" ! latexfontsize="scriptsize" | Pin#! latexfontsize="scriptsize" | SOM Pin#! latexfontsize="scriptsize" | RS232! latexfontsize="scriptsize" | RS485! latexfontsize="scriptsize" | Pin Notes

| 31| J1J18.189191| RS232_RXUART8_TX| Receive lineRS485_A

| 32| J1J18.187193| RS232_TXUART8_RX| Transmit lineRS485_B

| 93

| DGNDGround

UART3 USART3 is mapped to <code>/dev/ttymxc2ttyxxx</code> device in Linux. The peripheral  UART8 is used as the default serial console, both for the bootloader and the kernelmapped to <code>/dev/ttyxxx</code> device in Linux.

 To connect to Fix the debug serial port: # connect the DB9 adapter bracket signal cables to the J22 connector on the SBCX board# connect terminal with a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1small flat screwdriver.