2017-09-29 08:39 AM
The STM32F76/77 reference manual (RM0410 revision 2) description of the RCC_CFGR register (section 5.3.3) appears to have the MCO1 and MCO2 fields reversed. The fields listed as controlling MCO1 actually control MCO2, and the fields listed as controlling MCO2 actually control MCO1.