What is default state of Concerto pins, are pullups enabled or disabled?
F28m35h52c datasheet on page 49, 2.13.1, says: "By default, all pullups and outputs are disabled on reset, and all pins of the GPIO_MUX1 block are mapped to Cortex-M3 peripherals (and not to C28x peripherals).
However, on page 41, Boot Mode 7: "Boot Mode 7 typically does not require any external signals to drive the three boot mode pins, as by default, all three pins are internally pulled up to logic 1 (111b)."
Are those boot pins pulled up or not?
I have a board that executes code (M3, in flash) only when JTAG is connected, and in a process of figuring out what is wrong. I left those boot pins floating and would like to confirm that it is not the cause of my problem (before I make a mess from my pretty new board :)
The boot pin pullups are not enabled at reset. Threrefore you will need external pullups to enable certain boot modes.
This will be specifically mentioned in the next version of the datasheet.
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