Hi… 2 questions regarding the /RESET input to the Xbee3 (Cell Modem)
Is there any timing information on this provided? Specifically I’m wondering: a) how long does /RESET need to be held low, and b) is there any “max” timing on when the modem (specifically the UART interface) is active / responsive after releasing /RESET. I feel like there must be some magic datasheet (not “User Guide” but real datasheet) that I’m missing?
Regarding the force command mode… the manual reads: “you can recover the device to UART operation by holding DIN low at reset time. DIN forces a default configuration on the UART at 9600 baud and it brings the device up in Command mode on the UART port”. “Holding DIN low at reset time” – could you please be more vague? A timing diagram would be unambiguous. Sorry if I sound snarky, but if we’re engineering a product we’re not shipping hope & prayers with each module… we will conform to specifications and then expect things to work. So my question is: when is DIN pulled low relative to /RESET? On driving /RESET low? For any amount of time? Or only on releasing /RESET? Or both? Or…
Sorry for a little bit of snark but just give me the specs, Digi, please! And 1000 pardons if I’ve missed timing diagrams or tables with these values (sincerely).