I took mine apart and found out mine A9 doesnt have BK7231. It has an XF16 NA035EA6CD1 chip which is connected to T25S16 (16 Mbit Flash memory). Despite all my searches I am not able to find what chip XF16 is. But connection with external flash … is it an FPGA? They coudnt possibly have come up with a ASIC for a 2$ camera!! Does any one know what this chip is? Here are some pics:
