<section begin="History" />
{| style="border-collapse:collapse; "
!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
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|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"|X.Y.Z{{oldid|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"13369|Month Year2021/04/01}}|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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|-|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"|[TBD_link X.Y.Z]|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 Year|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"|TBD|-|! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fbededed; padding:5px; color:#000000"|...2023/09/06|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"|...|! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fbededed; padding:5px; color:#000000"|...Add SBC connector images
|-
|}
<section end="History" /><section begin="Body" />
==LCD interface ==
''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
=== Description ===
The LCD interface available on the Evaluation Kit at the connector ''TBD:Jxxx''. ''Jxx'' is a ''TBD:connector-type'' header connector for the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console)J13.
J13 si a 40-pin, 0.5mm pitch, ZIF connector that provides the following signals:
* 18-bit RGB interface
* DE and CLK control signals
* 3.3V power for logic
* 5V power for backlight
* PWM for backlight
[[File:{{{nomeETRA-som}}EVK-EVBbottom-LCD-connector.png|thumb|center|500px300px|LCD connector]]
===Signals ===
{| class="wikitable"
! latexfontsize="scriptsize"| Pin#! latexfontsize="scriptsize"| SOM Pin#! latexfontsize="scriptsize"| Pin name! latexfontsize="scriptsize"| Pin function! latexfontsize="scriptsize"| Pin Notes
|-
|1,2,410,11,12,16,20,24,28,632,36,737,839,1040
| -
| N.A.GND| N.C.Ground| Not connected
|-
| 3
| J1J18.18946| RS232_RXLCD_PWM| Receive linePWM for backlight
|
|-
| 34,5,6| J1.187-| RS232_TXLCD_5V| Transmit line5V for LED| this rail is enabled by the CPU via GPIO
|-
| 97,8
| -
| DGNDLCD_VDD| Ground3.3V for logic| this rail is enabled by the CPU via GPIO|-|9|J18.124|LCD_DE|LCD_DATA_ENABLE||-|13|J18.144|LCD_B7|LCD_B7 (MSB)||-|14|J18.142|LCD_B6|LCD_B6||-|15|J18.140|LCD_B5|LCD_B5||-|17|J18.138|LCD_B4|LCD_B4||-|18|J18.136|LCD_B3|LCD_B3||-|19|J18.134|LCD_B2|LCD_B2 (LSB)||-|21|J18.158|LCD_G7|LCD_G7 (MSB)|the use of this pin prevents the use of eMMC with 8bit bus|-|22|J18.156|LCD_G6|LCD_G6||-|23|J18.154|LCD_G5|LCD_G5||-|25|J18.152|LCD_G4|LCD_G4||-|26|J18.150|LCD_G3|LCD_G3||-|27|J18.148|LCD_G2|LCD_G2 (LSB)||-|29|J18.172|LCD_R7|LCD_R7 (MSB)||-|30|J18.170|LCD_R6|LCD_R6||-|31|J18.168|LCD_R5|LCD_R5||-|33|J18.166|LCD_R4|LCD_R4||-|34|J18.162|LCD_R3|LCD_R3||-|35|J18.160|LCD_R2|LCD_R2 (LSB)||-|38|J18.132|LCD_CLK|LCD_CLOCK|
|}
=== Device mapping ===
UART3 LCD is mapped to <code>/dev/ttymxc2fb0</code> device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernellinux.
=== Device usage ===
The connector is pinout compatible with the Ampire AM-800480BTMQW-TBMH-A display.
To connect to '''WARNING:''' the use of the LCD peripheral prevents the use of the debug serial port:eMMC on board of the ETRA SOM as 8bit bus, only 4bit bus is available.
# connect The periperal can be accessed by various linux packages as <code>fbi</code> (for simple image display), or more complex libraries as <code>QT</code> or <code>gstreamer</code>. === Alternate connector ===The ETRA SBC provides a secondary LCD connector (not mounted by default) for the use of 24bit LCD interface. ==== Description ====The 24-bit LCD interface can be available for the DB9 adapter bracket to Evaluation Kit at the J22 connector on J14. For the SBCX boarduse of this interface please send an e-mail to [mailto:helpdesk@dave.eu helpdesk@dave.eu] [[File:ETRA-EVK-bottom-LCD-connector_24bit.png|thumb|center|300px|LCD connector - 24 bit RGB]] # connect J14 si a serial cable between DB9 40-pin, 0.5mm pitch, ZIF connector that provides the following signals: * 24-bit RGB interface * DE, CLK, HSYNC and PC COM port through a NULLVSYNC control signals * 3.3V power for logic * 5V power for backlight * PWM for backlight * two GPIO signals for panel configuration ====Signals ==== The following table describes the interface signals: {| class="wikitable" ! latexfontsize="scriptsize" | Pin#! latexfontsize="scriptsize" | SOM Pin#! latexfontsize="scriptsize" | Pin name! latexfontsize="scriptsize" | Pin function! latexfontsize="scriptsize" | Pin Notes|-|9,18,27,36,40| -| GND| Ground| |-|1,2| -| LCD_5V| 5V for LED| this rail is enabled by the CPU via GPIO|-| 3| J18.46| LCD_PWM| PWM for backlight| |-|4|J18.58|LCD_5V_EN|LCD_5V power enable|can be used as GPIO if the 5V power switch is bypassed|-| 5.6| -| LCD_VDD| 3.3V for logic| this rail is enabled by the CPU via GPIO|-|7| -|LCD_DISP| pull-down (default)|can be statically configured with pull-up or pull-down|-|8|J18.124|LCD_DE|LCD_DATA_ENABLE||-|10|J18.144|LCD_B7|LCD_B7 (MSB)||-|11|J18.142|LCD_B6|LCD_B6||-|12|J18.140|LCD_B5|LCD_B5||-|13|J18.138|LCD_B4|LCD_B4||-|14|J18.136|LCD_B3|LCD_B3||-|15|J18.134|LCD_B2|LCD_B2||-|16|J18.176|LCD_B1|LCD_B1||-|17|J18.174|LCD_B0|LCD_B0 (LSB)|the use of this pin prevents the use of eMMC with 8bit bus|-|19|J18.158|LCD_G7|LCD_G7 (MSB)|the use of this pin prevents the use of eMMC with 8bit bus|-|20|J18.156|LCD_G6|LCD_G6||-|21|J18.154|LCD_G5|LCD_G5||-|22|J18.152|LCD_G4|LCD_G4||-|23|J18.150|LCD_G3|LCD_G3||-|24|J18.148|LCD_G2|LCD_G2||-|25|J18.180|LCD_G1|LCD_G1|the use of this pin prevents the use of uSD with 4bit bus|-|26|J18.178|LCD_G0|LCD_G0 (LSB)||-modem cable |28|J18.172|LCD_R7|LCD_R7 (not providedMSB)# start your favorite terminal emulator software on PC ||-|29|J18.170|LCD_R6|LCD_R6||-|30|J18.168|LCD_R5|LCD_R5||-|31|J18.166|LCD_R4|LCD_R4||-|32|J18.162|LCD_R3|LCD_R3||-|33|J18.160|LCD_R2|LCD_R2||-|34|J18.184|LCD_R1|LCD_R1|the use of this pin prevents the use of eMMC with 8bit bus|-|35|J18.182|LCD_R0|LCD_R0 (eg: PuTTYLSB); communication parameters are||-|37|J18.130|LCD_HSYNC|LCD_HORIZONTAL_SYNC|the use of this pin prevents the use of eMMC with 8bit bus|-|38|J18.132|LCD_CLK|LCD_CLOCK||-|39|J18.128|LCD_VSYNC|LCD_VERTICAL_SYNC||} === Device usage ==='''WARNING: 115200''' the use of the 24bit LCD peripheral prevents the use of the eMMC on board of the ETRA SOM as 8bit bus,Nonly 4bit bus is available. It also prevents the use of uSD device as 4bit bus,8,1only 1bit bus is available.
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[[Category:ETRA]]