Created Board FEZ Cerb40 (markdown)

Board-FEZ-Cerb40.md

@@ -0,0 +1,16 @@
+STM32F405RGT6 (same processor as used on the pyboard)
+* Home - https://www.ghielectronics.com/catalog/product/450
+
+###Features###
+* 168 MHz
+* 1 Mb Flash
+* 192K RAM
+
+###Building###
+To build, follow the directions for the [[STM Discovery STM32F407|Board-STM32F407-Discovery]], but use a ```BOARD``` of ```CERB40```.
+
+To enter DFU mode, connect the LODR pin to 3.3v and plug into USB (or reset the processor by momentarily connecting the REST pin to ground)
+
+The board should boot up in DFU mode. Once flashed with Micropython firmware, I find using the pyb.bootloader() command from the REPL to be a more convenient way of entering DFU mode.
+
+