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F767 ethernet errata and DBGMCU_CR

Question asked by Uwe Bonnes on Jun 22, 2017
Latest reply on Jun 29, 2017 by Tilen MAJERLE



the Ethernut ( STM32 Ethernet driver from svn head (/ works reliable for F107/F2/F4 and F74. However for F767 Revision A chip (no Rev Z chips available here), it does not start reliable, obvious caused by the F76 errata.


With DBGMCU->CR set to DBGMCU_CR_DBG_SLEEP | DBGMCU_CR_DBG_STOP | DBGMCU_CR_DBG_STANDBY, at least after some few System Resets, the network comes up.


With DBGMCU->CR set to 0, a long row of resets does _not_ bring up the network.


Did anybody else make this observation?


How do other people recover from the Rev. A F76x ethernet errata?