I just opened a HP wifi driven printer and found an Marvell Avastar 88W8782 Wifi Module with 12 Pin connector to the main board. From googling I found that this is a USB interface driven module but I cannot find a datasheet with any pinout info. This module is suppose to have a Uart and also a spi bus. Does anyone has any idea on how to use this module? Only datasheet I am end up with is enter link description here
Some links that may help you:
See Download section in the following link, download Application notes zip: http://www.embeddedworks.net/wlan493.html
check out the pdf file named 88MC200_Hardware_Design_Guide (MV-S302321-00) inside the zip file. (page 15) It talks about interfacing a microcontroller to this WiFi module.