While many attempt to use it for other purposes, the WICED Sense Kit is really just a Demo Board (i.e. designed for show and tell). There is only a product brief on Broadcom.com: WICED™ Sense | Broadcom
Nothing similar to a detailed datasheet.
There is a good Table of Contents with links here that many find useful: WICED Sense Table of Contents
There are also alot of threads specific to WICED Sense scattered throughout the website and summarized here: WICED Smart Forums
The TAG3 board is our official development platforms. The following two documents describe that board in detail, along with a few sample procedures for using the board with the sample apps included within the SDK:
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If you need a datasheet for the BCM2073X SIP module or SoC, then these are the two documents you should take a look at: