Part Number:TMS320F28335
Hi,
my customer is using F28335.
What's the state of SCI pins when they are configured to work as SCITX and SCIRX? The customer is connecting these pins with external 3.3V(connected to ground through a cap) through pull up resistor, but even when the external 3.3V is not powered, they can measure 3.3V on these pins, so they are curious what's the state of SCITX and SCIRX pins.
How long should XRS pin should be pulled low after power up?(they are choosing external reset chip)
In power sequencing chapter, there is a delay between device powered up and clock settled(tOSCST), during this time, the XRS should be pulled low, right? But in the datasheet, only nominal value of tOSCST is given=10ms, how about the longest time? Will the temperature affect this time?
Howard