On Fri, Oct 27, 2017 at 10:23:54PM -0500, David Ashley wrote: > On 10/26/17, James Cameron <qu...@laptop.org> wrote: > > Interesting, thanks. It should be a QFN 46 pin chip; you may have > > counted 15 instead of 14 pins on the long edge. Send me a photograph > > of the inside, off-list? > > I uploaded a couple of pictures here: > http://www.linuxmotors.com/RTL8188CUS/ > > You're right, I miscounted, it has 46 pins.
Thanks. The BZ5JA might be 5V to 3.3V switching voltage regulator, with inductor above it. Datasheet shows there is internal non-volatile memory, powered from pin 27, which has a trace to an external filter capacitor. The large zero ohm resistor bottom right is interesting; size chosen for accessibility; probably for fault isolation or qualification. In summary, the board design is consistent with the datasheet, and confirms non-volatile memory that will contain configuration data and probably firmware. I agree with Larry; try the firmware file. -- James Cameron http://quozl.netrek.org/
