MCU Board STM32F4 v1

= Status: Completed = = Introduction = MCU Board STM32F4 v1 is a standalone MCU board that can be attached to a Base Board v1 providing over 40 I/O pins addition to 5V, 3.3V and GND pins.

MCU Board is put upside down to the Base Board so the SWD pin header must be 90 degree angle header.

Note! Only USB power is supported in which case 5V and 3.3V are provided to external pins. If 5V is provided externally to the MCU board using the 5V pin, the JP2 breaker must be cut to prevent proving (over)voltage to MCU's USB OTG VBUS sense pin. If 3.3V is provide externally to the MCU board using the 3.3V pin, the JP3 breaker must be cut to prevent reverse current to the regulator. In both cases the external power must have external reverse voltage protection in place. = Debug connection =

= Design =

NOTE! The SWD pin header must be 90 degree angle to allow upside down placement to Base Board. NOTE!! The Pin1 dot is in the wrong place



= BOM =

For TPS70933 DCY (still in preview, 9.1.2014)
= Errata =
 * Reset capasitor (C4) should be closer to the MCU pin.
 * Debug pin names should be also on the bottom silk screen for Base Board usage.
 * Debug pin header could be further away from the PCB edge so that the 90 degree pins wouldn't come so much outside the PCB area.