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awneil
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re: Updated: Android targets unity, USB support
awneil   5/17/2011 8:37:48 AM
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This article appears to be incorrect in stating that, "Android is unusual in that it is defined as a device, not a host". As I commented earlier, that would be ridiculous! In fact, it is only the "Accessory" mode in which Android is the Device - there is also a Host mode: http://developer.android.com/guide/topics/usb/accessory.html http://developer.android.com/guide/topics/usb/host.html

awneil
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re: Updated: Android targets unity, USB support
awneil   5/17/2011 6:25:45 AM
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@Selinz: NO! It means exactly that you can *not* hook up *any* of your current USB "accessories" to *any* Android device! This means that you are going to have to get a whole new set of accessories - just for use with your Android device(s)! It's hard enough getting technical people to realise this - how on earth are Google going to explain it to consumers?! It will also vastly increase the design complexity of the devices - as they will have to provide a USB *Host* stack. Sounds like utter madness to me! Should be good business for the likes of http://www.vinculum.com though...!

selinz
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re: Updated: Android targets unity, USB support
selinz   5/13/2011 6:02:17 PM
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Presumably this means that we can hook up a portable hard drive, for example, to our phones? Sounds good to me.. As far as the @home, it's about time X10 got a replacement.

chanj0
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re: Updated: Android targets unity, USB support
chanj0   5/11/2011 4:56:35 PM
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Android device being a USB device makes sense to me since it shall not allow being drawn power. Yet, how does it work with regular USB device such as keyboard and mouse? Personally, I am more interested in the 915MHz Open source wireless mesh protocol. What would be the benefit over Zigbee and Z-wave? Cost apparently? What else?

old account Frank Eory
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re: Updated: Android targets unity, USB support
old account Frank Eory   5/10/2011 9:42:53 PM
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Why didn't they just use USB OTG in Android? Connectivity of mobile devices to peripherals is exactly what OTG was developed for. It makes no sense that an Android tablet or smartphone must be a USB device, which means the peripheral must be the USB host.

Luis Sanchez
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re: Updated: Android targets unity, USB support
Luis Sanchez   5/10/2011 9:01:54 PM
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That part of the USB device and host relation is tricky. I mean, usually we identify the host as the bigger device and the accesories as the smaller ones. If an accessory is connected to the Android phone, it will be a little odd to remember that it's the accessory the one playing the host and not the phone. Anyway, it sounds very interesting. That part of "no NDA and no fees" sounds intimidating for the market. There must be somekind of control out there. Otherwise... what will become of Android? a world of no warranties?



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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