Search found 12 matches

by SomeCallMeTim
Wed Jun 03, 2020 7:05 pm
Forum: General Discussion
Topic: ESP32-S2FH16?
Replies: 1
Views: 2646

ESP32-S2FH16?

Hello - I was noticing that there is now a ESP32-S2 variant that has shown up - the ESP32-S2FH16. It mentions there is 2MiB of flash onboard for this part - does it also embed some of the surrounding components such as the 40MHz crystal like the PICO module does, or does it just have additional flas...
by SomeCallMeTim
Fri May 22, 2020 5:14 pm
Forum: Hardware
Topic: RTC with 32.768 kHz crystal
Replies: 14
Views: 28421

Re: RTC with 32.768 kHz crystal

I'll chime in that for us we weren't able to make the crystal stable and ended up going with a MEMS oscillator instead. After we did our design with the MEMS oscillator, there is now an ECO indicating a fix for "Optimized 32.768 kHz crystal oscillator stability". See https://www.espressif.com/sites/...
by SomeCallMeTim
Thu May 21, 2020 8:03 pm
Forum: Hardware
Topic: ESP32D2WD SPI and JTAG pin with MUX
Replies: 4
Views: 4569

Re: ESP32D2WD SPI and JTAG pin with MUX

Hi Vlucio - Take a look at the GPIO matrix within the TRM. Most internal signals can be mapped to any external pin. There are some more "direct" paths, which are what are documented in the hardware reference manual, but you can get SPI signals out of any of the pins. See Figure 7 in the TRM - "IO_MU...
by SomeCallMeTim
Thu May 21, 2020 2:34 pm
Forum: General Discussion
Topic: ESP32-S2: 802.11mc FTM support?
Replies: 8
Views: 11449

Re: ESP32-S2: 802.11mc FTM support?

That's great!

Thanks,
Tim
by SomeCallMeTim
Thu May 21, 2020 2:13 pm
Forum: Hardware
Topic: Validating frequency of external crystals
Replies: 0
Views: 1970

Validating frequency of external crystals

Hello! I'm looking for a way to validate the operating frequency of the 40MHz crystal in one of our designs attached to a ESP32-D0WDQ6. Is there a way to output the 40MHz clock onto a pin on the system? I see that you can for the 32kHz clock, although, that isn't documented in the technical referenc...
by SomeCallMeTim
Mon Apr 20, 2020 3:33 pm
Forum: Hardware
Topic: Clarification for CHIP_PU voltage levels
Replies: 1
Views: 4574

Clarification for CHIP_PU voltage levels

Hello - For CHIP_PU, the datasheet states: High: On; enables the chip Low: Off; the chip powers off Note: Do not leave the CHIP_PU pin floating. What voltage is "high" to enable the chip? Typically it'd be something like 75% of VDD, but the diagrams for Vil_nrst (such as "Figure 5: ESP32 Power-up an...
by SomeCallMeTim
Thu Mar 12, 2020 7:47 pm
Forum: General Discussion
Topic: ESP32-S2: 802.11mc FTM support?
Replies: 8
Views: 11449

ESP32-S2: 802.11mc FTM support?

Hello - Just curious about the 802.11mc support that's mentioned in the datasheet. Will there be support for both client mode and access point mode? E.g. could you have two ESP32-S2s, and measure the rough distance between them using 802.11mc? When is this on the roadmap for software support for thi...
by SomeCallMeTim
Tue Mar 03, 2020 2:36 am
Forum: General Discussion
Topic: ESP32-S2: USB bootloader?
Replies: 3
Views: 6109

Re: ESP32-S2: USB bootloader?

Hi Angus - That's great news! (In addition to the reference manual, I was speculating that CDC-ACM and DFU might've been in there based on the *_descriptors symbols exported.) Looking forward to trying out the ESP32-S2 at some point. I looked around a bit in the esp-idf, and I didn't see any USB sup...
by SomeCallMeTim
Mon Mar 02, 2020 4:58 pm
Forum: General Discussion
Topic: ESP32-S2: USB bootloader?
Replies: 3
Views: 6109

ESP32-S2: USB bootloader?

Hello -

I was reading the technical reference manual for the ESP32-S2, and noticed it refers to download boot mode via USB. Does this mean it's possible to load code onto a blank ESP32-S2 via USB?

Thanks,
Tim
by SomeCallMeTim
Fri Apr 26, 2019 6:46 pm
Forum: Hardware
Topic: ESP32 PICO KIT 4.1 - MTDI Pullup
Replies: 2
Views: 4380

Re: ESP32 PICO KIT 4.1 - MTDI Pullup

It's also possible to force 1.8V or 3.3V operation regardless of the MTDI pull status with an eFuse. See https://github.com/espressif/esptool/wi ... e-vdd_sdio.