Benson here again, continuing my reviews of USB Type C legacy cables. Today I am reviewing Anker's USB Type C to Type A USB2.0 cable.
Let's talk about spec compliance. My test setup today include a Chromebook Pixel 2015, and a Chromium OS USB-PD Sniffer (codename Twinkie). Please check it out by searching google for "Chromium USB-PD Sniffer". This product is also available on Amazon here : Plugable USB 3.1 Type-C (USB-C) Power Delivery Sniffer
I got a comment in one of my previous reviews that I should be testing with a 2.4A capable power supply to demonstrate that the cable is of good enough quality to sustain 2.4A charging, so for this review, I am using one of Apple's 1st party power adapters with a 5.2V, 2.4A charging capability, specifically Apple's MacBook charger.
Running the ectool command on Pixel:
localhost ~ # ectool --name cros_pd usbpdpower Port 0: SNK Charger Proprietary 4631mV / 2400mA, max 5000mV / 2400mA / 12000mW Port 1: SRC
In this case, the Pixel has negotiated up to 2.4A of charging through the Anker cable to the Apple charger.
Switching over to the USB PD sniffer, I'll run the "tw cc" command to get a voltage reading on both CC lines: > tw cc CC1 = 416 mV ; CC2 = 17 mV
The important number to look at here is CC1, which indicates a voltage of 416mV. If you refer to the USB Type-C Specification 1.1 Table 4-25. Look at the row labeled vRd-USB, which indicates the legal voltage values to read from the CC pin in order to be categorized as "Default USB Power". The range is Min : 0.25V Max : 0.61V. For this cable, I measured a value of 0.416V right in the middle of this range, indicating that yes, this cable has a 56kΩ resistor and is within spec for CC termination.
One more twinky command : > tw vbus VBUS = 4682 mV ; -2440 mA
The vbus command here uses twinkie's built in current and voltage meter. It's confirmed that Pixel is charging at 2.4A.
For a USB 2.0 High Speed data test, I’ve hooked my Nexus 5X to my Chromebook Pixel via the Anker Type-A to Type-C cable to test large file transfer via MTP. It just works, no problem!
For other more subjective judgements of this cable : The Type-C plug on this cable is a very good quality plug made with a deep-draw extrusion process. The plug is a single continuous piece of metal all the way around, meaning it's stronger than other stamped type plugs. This type of plug is the same kind that is used on all of Google and Apple's Type-C plugs, and the quality shows here. Like all Anker cables, it comes with a very handy velcro cable tie. In my opinion, the fit and finish of the Anker cable is at the same level as the ones from the first parties including Google, Apple, and others.
In conclusion, this is a fine cable for your Nexus 6P/5X to use with all of your older USB Type-A chargers, hubs, and PCs. It also works great with Chromebook Pixel 2015 and will work great on USB Type-C spec compliant devices to come!