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Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/boards/stm32mp.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/boards/stm32mp.rst b/Documentation/boards/stm32mp.rst index f93ec04eb0..6d97b0d6d4 100644 --- a/Documentation/boards/stm32mp.rst +++ b/Documentation/boards/stm32mp.rst @@ -81,3 +81,13 @@ pulled down and BOOT0 and BOOT2 are connected to a 2P DIP switch:: BOOT2 | O --O | BOOT0 | N --O | <---- DFU on UART and USB OTG +-------+ + +Boot status indicator +--------------------- + +The ROM code on the first Cortex-A7 core pulses the PA13 pad. +An error LED on this pad can be used to indicate boot status: + +* **Boot Failure:** LED lights bright +* **UART/USB Boot:** LED blinks fast +* **Debug access:** LED lights weak |