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This page provides useful information and resources to system designers in order to design carrier boards hosting '''DAVE Embedded Systems''' system-on-modules (SOM).
These guidelines are provided with the goal to help designers to design compliant systems with '''DAVE Embedded Systems''' modules and they cover schematics and PCB aspects. They apply to several products that are listed on the top right corner of this page (see "Applies to" boxes).
== Basic guidelines ==
In this section basic hardware guidelines valid for all '''DAVE Embedded Systems''' SOMs are detailed.
=== Schematics ===
* Check mirroring and pinout of '''DAVE Embedded Systems''' system-on-modules (SOM) connector* Properly decouple '''DAVE Embedded Systems''' system-on-modules (SOM) power supply with large bulk capacitor and small bypass capacitor
* Use low-ESR X7R capacitor if possible
* Check for correct connection of TX and RX lines
* Avoid voids on planes
* Use Solid Connection for on plane vias
* Place bulk and ByPass capacitor near '''DAVE Embedded Systems''' system-on-modules (SOM) power supply pins
* Place series terminator resistor near the related transmitter
== Interfaces Guidelines ==
This section provides guidelines for the most used interfaces on '''DAVEEmbedded Systems'''s SOMs module. <br/>
Please refer to SOM's detailed pages for specific additional information.
=== Ethernet 10/100/1000 ===
=== USB ===
==== Schematics ====
* Create schematic in accordance with '''DAVE Embedded Systems''' system-on-modules (SOM) USB specification ( see SOM detailed pages )
==== PCB ====
{| {{table border=1}}
=== LCD Interface ===
==== Schematics ====
* Please refer to '''DAVE Embedded Systems''' system-on-modules (SOM) carrier board documentationfor further information
* Predispose series resistor terminator (RPACK for LCD data and single resistor for Clock and H-SYNC and V-SYNC)
* Series resistor value may vary depending by PCB and schematic
=== VIN Interface ===
==== Schematics ====
* Please refer to '''DAVE Embedded Systems''' system-on-modules (SOM) carrier board documentationfor further information
* Predispose series resistor terminator (RPACK for LCD data and single resistor for Clock and H-SYNC and V-SYNC)
* Series resistor value may vary depending PCB and schematic
=== TVOUT ===
==== Schematics ====
* Please refer to '''DAVE Embedded Systems''' system-on-modules (SOM) carrier board documentationfor further information
==== PCB ====
{| {{table border=1}}
=== I2C Interface ===
==== Schematics ====
* Predispose properly pullup resistors on line in accordance with '''DAVE Embedded Systems''' system-on-modules (SOM)
* Do not overload I2C lines with too much devices
* Ensure that I2C devices are being properly initialized during power up
