Google has new guidelines to be published online for Android devices from third parties. The compatibiliteitsdocument speaks about strong recommendations to make certain the USB Type-C implementations to follow, and even says that it is important to run future Android versions as possible. Under more Qualcomm used an implementation that does not comply with it.
The company insists on the implementation of the standard guidelines, presumably so that USB Type-C is just as easy as it seems. Especially with the charging of devices is often gegoocheld, so it is much faster than before. Among others, Qualcomm fits with its Quick Charge functionality, the one and the other, which is deviated from the standard and data lines in the cable used for charging. Also are causing the company with the Vbus, which, according to the guidelines to a maximum of 5 Volts, but at 20 Volts jacked up. This has Qualcomm already under attack. Also, because of this, not all of the accessories are compatible and USB Type-C, is more difficult than it should be. The HTC 10 had therefore been problems with chargers from other parties.
If the USB Power Delivery standard is applied, then several wires in a USB cable also used for charging the phone, but there is a difference. Qualcomm’s solution does not make it possible to, according to the standard, depending on the question of the threads to configure, whereas with USB Power Delivery. The built-in chip fits all to the question, including the wires that data to pass. Please also read our achtergrondartikel about rapid recharging via USB.
Google has now made its policy changes, so implementations such as that of Qualcomm, via the guidelines of the USB-alliance (would) have to work. That means support for USB Power Delivery, which, depending on the demand you can switch between fast charge, output image, use as a powerbank to charge, and classical data transfer. At the moment, a number of requirements are only strong recommendations, but there is the warning given that if this is not true, that compatibility with new Android versions may not be possible. Below are the full requirements.
- It SHOULD implement support to draw 1.5 A current during HS chirp and traffic as specified in the USB Battery Charging specification, revision 1.2 . Existing and new Android devices are STRONGLY RECOMMENDED to meet these requirements so they will be able to upgrade to the future platform releases.
- Type-C devices MUST detect 1.5 A and 3.0 A usb chargers per the Type-C resistor standard and it must detect changes in the advertisement.
- Type-C devices also support USB host mode are STRONGLY RECOMMENDED to support Power Delivery for data and power role swapping.
- Type-C devices SHOULD support Power Delivery for high-voltage charging and support for Alternate Modes such as display out.
No comments:
Post a Comment