Google has a set of rule of thumb for Android manufacturing business call in theAndroid Compatibility Definition Document(CDD ) . This papers essentially outlines what gadget makers need to do to check that their gadget are compatible with Android .
The CDD was updated this week for Android 7.0 ( Nougat ) , and entomb inwardly are some interesting changes , especially for USB - C. AsArs Technicaspotted , Google is now strongly recommending that manufacturing business habituate USB Power Delivery for tight - charging , not proprietary solution .
This is what theCDD says :
eccentric - C twist are STRONGLY RECOMMENDED to not support proprietary charging methods that modify Vbus voltage beyond default point , or alter sink / seed purpose as such may ensue in interoperability issue with the chargers or gimmick that support the received USB Power Delivery method . While this is hollo out as “ STRONGLY RECOMMENDED ” , in succeeding Android version we might REQUIRE all type - light speed machine to support full interoperability with standard type - C chargers .
tight - charging is now a rough-cut feature across Android smartphones . It ’s a great feature because who want to squander hour if you’re able to get a spry top - off in just a few minutes . the right way now , there are a few competing USB fast - charge options . Qualcomm , who make chipsets for most high - terminal smartphones , has its own proprietary tight - level solution called Quick Charge . Phones from Asus , HTC , Xiaomi , LeEco , LG , ZTE , and Sony all use Quick Charge .
But there is an official USB criterion too call USB Power Delivery ( USB - PD ) , and that ’s the standard Google wants maker to focus on . This make some sentiency , since focusing on a manifest standard rather than a proprietary solution meet more with Google ’s “ open ” ethos .
Even though it ’s just a recommendation , Google ’s move could become a prerequisite in the future tense . That ’s bad news for Qualcomm , who often sells Quick Charge as part of its Snapdragon chipsets . ( We ’ve reached out to Qualcomm for comment on how this affects its design for the future and will update if we hear back . )
Google is making another alteration to its USB - one C passport , and this one is just right sensation for everyone involved . Again from the CDD :
This basically imply that a USB - ampere-second machine has to be able to detect changes in how much power is sent to the machine . This is crucial because as aGoogle engineer found , cheap USB - C cables couldfry your laptop or phone . The USB Implementors Forum ( USB - IF ) is already make onforcing devices to authenticatebetween expert cables and bad cables , but this requirement would insure that equipment makers have the proper provisions in place to stop a cable’s length from short-circuit out .
[ GoogleviaArs Technica ]
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