<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

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The STM32MP1 can handle external pins in many different ways and most of them can be configured as GPIOs interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  ''Jxx'' When a pin is set as a ''TBD:connector-type'' header connector for GPIO, it is possible to read its value, change its direction or change output value directly from the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console).  [[File:{{{nome-som}}-EVB-GPIOs-connectorshell.png|thumb|center|500px|GPIOs connector]]

The following table describes the interface some GPIOs signalsavailable on J12 (2x15x2.54mm) connector: {| class="wikitable" ! latexfontsize="scriptsize"| Pin#! latexfontsize="scriptsize"| SOM Pin#! latexfontsize="scriptsize"| Pin name! latexfontsize="scriptsize"| Pin function! latexfontsize="scriptsize"| Pin Notes|-|3|J18.97|PD13|||-|5|J18.99|PD12|||-|6|J18.34|PB13|||-|7|J18.101|PD11|||-|8|J18.68|PB5|||-|9|J18.105|PG9|||-|12|J18.48|PA12|||-|14|J18.38|PA11|||-|18|J18.80|PF6|||-|20|J18.76|PF9||

|1,2,4,6,,7,8,1022| -J18.74| N.A.PF7| N.C.| Not connected

| 324| J1J18.18978| RS232_RXPF8| Receive line|

| 326| J1J18.187181| RS232_TXPD6| Transmit line|

| 928| -J18.28| DGNDPA9| Ground|

UART3 is mapped to <code>/dev/ttymxc2</code> GPIOs can be used directly on Linux kernel device in Linux. The peripheral is used as driver or can be configured on the default serial console, both for the bootloader and the kerneldevice tree.

To connect to See the debug serial port: # connect the DB9 adapter bracket to the J22 connector [[ETRA SOM/DESK-MP1-L/Pheripherals/GPIOs|GPIOs]] page on the SBCX board# connect a serial cable between DB9 connector and PC COM port through a NULL[[ETRA SOM/DESK-MP1-L|DESK-MX6-modem cable (not provided)# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1L]] Software Manual.