hi,
the GPMC_D [0 to 15]/BTMODE[0 to 15] are used for boot config and as normal operational data bus.
can you suggest values for PU and PD resistors that configures the Boot and does not interfere the data bus during run time?
in my design '0' is defined as 100k resistor to the GND as input
and '1' is defined by voltage divider of 20k and 100k between 3.3 volt to GND, as input
(3.3 *100)/ (100 +20) volts as '1'
please your advice
regards
Tsfania
Tsfania,
Are you using static pulls for the boot mode? Or are you using some type of DIP switch (like we do on EVMs?)
In any case, you should use a 10k pull-down (recommend stronger than 100k).
If you are just using resistors, you can have a pop/no-pop scheme for PU vs PD and populate 10k on either pull-up or pull-down. If you're trying to use an inline DIP switch you should use 1k for the PU, only enabled when the switch is flipped, something like this:
Regards,
Kyle
