View Full Version : RESn and BOEn state w/o reset circuit

03-25-2012, 04:56 PM
I will be programming the EEPROM out of circuit so therefor I never need to reset the prop.

What states should the RESn and BOEn lines be hardwired to?



03-25-2012, 05:02 PM
RESn should be high, and BOEn should be low.

03-25-2012, 05:09 PM
Apparently there is a internal 5k pullup on the RESn if BOEn is low, but still could not hurt to tie RESn to Vdd.

BOEn (Input)
Brown Out Enable (active low). Must be connected to either VDD or VSS.
If low, RESn becomes a weak output (delivering VDD through 5 KΩ) for monitoring purposes but can still be driven low to cause reset.
If high, RESn is CMOS input with Schmitt Trigger.

RESn (Input / Output)
Reset (active low). When low, resets the Propeller chip: all cogs disabled and I/O pins floating. Propeller restarts 50 ms after RESn transitions from low to high.