Foxconn MIC-B2

This module handles the Wi-Fi Direct connections to the Wii U gamepads
 * This device is a 5GHz wireless module used in the Nintendo Wii U.
 * (which use Miracast). It is visible in iFixit's teardown.

There is a Macronix MX25L4006EZNI-12G (512KB Serial Flash) on-board.