What is the default state of the outputs of the cobtroller immidiately after reset?
Do i need to put pull up/pull down on board?Regarding inputs, do i need to place pull up/pull down on inputs (or outputs) not used?
I've looked in the data sheet but probabely missed it.
Any help will do.
Thanks
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The 'reset state' of all control registers is called out in the Reference Manual, including the 'pin mux' table, but the general statement is: 'reset state is the safest possible for any possible interconnect'. That is, analog-in-capable pins will default to said analog-in mode, and digital pins will default to input, most with 'no pull'.
So yes, by-and-large anything you need to have as a 'known state' during/just-after reset will need your own external pull-resistors.
Hi Roy,
Some special function pins need take care. For exmaple: Reset_b\ NMI_b\ VREF_OUT\ JTAG_TMS
I recommend you read the "Chapter 2 General System Setup (Hardware Considerations)" of KQRUG.
Best Regards,
Robin
The 'reset state' of all control registers is called out in the Reference Manual, including the 'pin mux' table, but the general statement is: 'reset state is the safest possible for any possible interconnect'. That is, analog-in-capable pins will default to said analog-in mode, and digital pins will default to input, most with 'no pull'.
So yes, by-and-large anything you need to have as a 'known state' during/just-after reset will need your own external pull-resistors.