Search found 3 matches

by PiMaker
Tue Feb 13, 2018 3:39 pm
Forum: Hardware
Topic: ADC input impedance
Replies: 4
Views: 1172

Re: ADC input impedance

Though I don't have any hard values for input impedance since they aren't listed in the spec, it would seem dependent on which ADC you select. SAR ADC1 has a built-in LNA, so you should be able to configure it as a unity gain amplifier which as I'm sure you know will give you extremely low input imp...
by PiMaker
Tue Feb 13, 2018 3:33 pm
Forum: Hardware
Topic: OpenOCD with Sparkfun ESP32 Thing
Replies: 1
Views: 242

Re: OpenOCD with Sparkfun ESP32 Thing

Just a note that this is what happens when your clock frequency is too high in the configuration. First, the J-Link Plus states that the max interface speed is 15/50 MHz based on the model. Second, the impedance you create by connecting it will have a large effect on the frequency you can use. I sus...
by PiMaker
Mon Feb 12, 2018 5:52 pm
Forum: Hardware
Topic: OpenOCD with Sparkfun ESP32 Thing
Replies: 1
Views: 242

OpenOCD with Sparkfun ESP32 Thing

Hello, I'm attempting to follow http://esp-idf.readthedocs.io/en/latest/api-guides/jtag-debugging/ to set up a Sparkfun ESP32 Thing but using the Segger J-Link Plus JTAG. I created an OpenOCD "board" configuration file for it by setting the following: transport select jtag adapter_khz 2000...

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