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− | {{WorkInProgress}}
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| {{InfoBoxTop}} | | {{InfoBoxTop}} |
| {{AppliesToDacu}} | | {{AppliesToDacu}} |
| {{Applies To Diva}} | | {{Applies To Diva}} |
| {{InfoBoxBottom}} | | {{InfoBoxBottom}} |
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− | ==Introduction==
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− | When used in combinaton with [[:Category:Diva|Diva SOM]], DACU requires the use of [[DivaEVB-Lite]] acting as adaptation board. The overall system looks like the following picture and it is composed by
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− | * Diva SOM
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− | * DivaEVB-Lite
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− | * Dacu carrier board.
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− | [[File:Diva divaevb dacu.png|600px]]
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− | In order to make DACU compatible with this configuration, some additional wired connections are required, as detailed in the [[Dacu#Schematics|schematics]]. The following sections explains in more detail these issues.
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− | === Block diagram ===
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− | The following figure shows the system block diagram:
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− | [[File:Dacu-diva-block diagram.png|600px]]
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− | ==Power supply==
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− | This is the power-up sequence of the whole system (it matches [[Hardware_Manual_%28Diva%29#Power.2C_reset_and_control|Diva recommended power-up sequence]]):
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− | # power supply or wall adapter connected to DACU's JP2 is turned on
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− | # DACU's U15 DC/DC PSU is turned on; since the output of this DC/DC is connected to DivaEVB-Lite's VREG rail, Diva SOM is powered
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− | # Diva performs its own power-on sequence
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− | # DivaEVB-Lite's U4 linear regulator is enabled by Diva
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− | # DivaEVB-Lite's 3.3V rail raises; since this rail is connected to DACU's ENA_3.3V, DACU's U16 DC/DC PSU is enabled and DACU's circuitry interfacing processor's I/O is powered
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− | ==DACU's USB host port==
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− | DACU's USB host port power is controlled by Micrel MIC2026 Dual-Channel Power Distribution Switch (U7). B channel of this swith is associated to USB host port. In order to control this channel, Diva's USB1_DRVVBUS and VUSB_VBUS1 signals are connected to ENB and FLGB pads respectively.
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− | == Schematics ==
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− | {{ImportantMessage|text=Please note that Orcad CIS is required to get all the information about BOM variants included in .dsn files.
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− | PDF files show the view of the default BOM variant used to manufacture the board. Components that are not populated are denoted as "Do Not Stuff".}}
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− | * Orcad: http://mirror.dave.eu/diva/dacu//dacu-DACUEVB_2.0.2-dsn.zip
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− | * PDF: http://mirror.dave.eu/diva/dacu//dacu_S.DACUD000I2R.2.0.2.pdf
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− | ==BOM==
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− | * http://mirror.dave.eu/diva/dacu/dacu_BOM_S.DACUD000I2R.2.0.2.csv_.zip
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