Search found 32 matches

by ESP_Lvxinyue
Tue Feb 12, 2019 2:44 am
Forum: Documentation
Topic: Documentation Requests/Feedback
Replies: 48
Views: 27099

Re: Document Requests/Feedback

Hi, I was wondering if there was an inconsistency in the documentation with respect to the ADC1 channel mappings. Here is what I see from the latest docs: page 34 of esp32_datasheet_en.pdf V2.8: ADC1_CH0 SENSOR_VP ADC1_CH1 SENSOR_VN ADC1_CH2 SENSOR_CAPP ADC1_CH3 SENSOR_CAPN Notice that ADC1_CH3 is ...
by ESP_Lvxinyue
Thu Jan 24, 2019 4:00 am
Forum: Hardware
Topic: Running VDD3P3_CPU at 1.8 Volt (ESP32-D2WD)
Replies: 1
Views: 235

Re: Running VDD3P3_CPU at 1.8 Volt (ESP32-D2WD)

Hello, Is it possible to run VDD3P3_CPU at 1.8 volt while all other supplies are at 2.7 Volt? If so, is it safe to assume that all IOs will operate at 1.8 volt? Thank you very much in advace for help. Kishan Hi, Is it possible to run VDD3P3_CPU at 1.8 volt while all other supplies are at 2.7 Volt? ...
by ESP_Lvxinyue
Wed Dec 26, 2018 8:59 am
Forum: General Discussion
Topic: Difference between ESP32-WROVER and ESP32-WROVER-B
Replies: 4
Views: 425

Re: Difference between ESP32-WROVER and ESP32-WROVER-B

What is the difference between ESP32-WROVER and ESP32-WROVER-B modules? Does ESP32-WROVER-B has more PSRAM than ESP32-WROVER? Hi, They both have 8 MB PSRAM. ESP32-WROVER has PSRAM that operates at 1.8 V and can support up to 144 MHz clock rate. ESP32-WROVER-B has PSRAM that operates at 3.3 V and ca...
by ESP_Lvxinyue
Wed Dec 19, 2018 8:34 am
Forum: General Discussion
Topic: Difference between ESP32-WROVER and ESP32-WROVER-B
Replies: 4
Views: 425

Re: Difference between ESP32-WROVER and ESP32-WROVER-B

What is the difference between ESP32-WROVER and ESP32-WROVER-B modules? Does ESP32-WROVER-B has more PSRAM than ESP32-WROVER? Hi, They both have 8 MB PSRAM. ESP32-WROVER has PSRAM that operates at 1.8 V and can support up to 144 MHz clock rate. ESP32-WROVER-B has PSRAM that operates at 3.3 V and ca...
by ESP_Lvxinyue
Fri Dec 14, 2018 7:00 am
Forum: Hardware
Topic: What is status of GPIO13 after reset?
Replies: 2
Views: 308

Re: What is status of GPIO13 after reset?

There, Sorry everyone, I don't know Baidu‘s pictures can't be viewed. So I reposted a post. On page 50 of ESP32_TRM_rev3.8.pdf , the table 18: IO_MUX Pad Summary . It write MTCK/ GPIO13 is IE = 1(input enabled) on after reset . But On page 58 of ESP32_DS_rev2.5.pdf , the IO_MUX list . It write MTCK...
by ESP_Lvxinyue
Fri Dec 14, 2018 2:57 am
Forum: Hardware
Topic: ESP32-PICO-D4 circuit question
Replies: 3
Views: 565

Re: ESP32-PICO-D4 circuit question

loboris wrote:
Tue Dec 11, 2018 8:23 am
ESP_Lvxinyue wrote:
Tue Dec 11, 2018 3:11 am
4. No, you don't need to add caps between SVP and SCP, SVN and SCN, unless you want to use the LNA ADC.
Which is not supported. Or, is it?
No, it's not supported. Thanks for the reminder :)
by ESP_Lvxinyue
Tue Dec 11, 2018 3:11 am
Forum: Hardware
Topic: ESP32-PICO-D4 circuit question
Replies: 3
Views: 565

Re: ESP32-PICO-D4 circuit question

Hello, I'd like to use ESP32-PICO-D4 in my motorcycle data-logger module. First of all - do i need anything more that things in "peripheral schematics" in datasheet to run module? Secondly - 5 meters of wifi range is more than enough for me, then do i need to make matching circuit (L5, C27, C28) fo...
by ESP_Lvxinyue
Fri Dec 07, 2018 6:34 am
Forum: Documentation
Topic: [Documentation Release] ESP32 Technical Reference
Replies: 37
Views: 35469

Re: [Documentation Release] ESP32 Technical Reference

Hi all, the TRM is now V4.0. Major changes span four chapters. The link remains the same: https://www.espressif.com/sites/default ... ual_en.pdf
Remember to subscribe to our email notification at: https://www.espressif.com/en/subscribe
by ESP_Lvxinyue
Tue Nov 27, 2018 6:26 am
Forum: Documentation
Topic: Documentation Requests/Feedback
Replies: 48
Views: 27099

Re: Document Requests

michprev wrote:
Sat Nov 24, 2018 3:58 pm
Setting SPI_CLKCNT_H too high in SPI_CLOCK_REG register makes in some cases (probably depending on SPI_CLKCNT_N) stop SPI working. This is not documented.
PI_CLKCNT_H=⌊SPI_CLKCNT_N+1/2 – 1⌋, SPI_CLKCNT_N=SPI_CLKCNT_L
by ESP_Lvxinyue
Tue Nov 27, 2018 6:24 am
Forum: Documentation
Topic: Documentation Requests/Feedback
Replies: 48
Views: 27099

Re: Document Requests

[SPI] CS setup time does not work in full duplex I don't think you realise how huge problem this is. Full-duplex is the most common setup and most SPI peripherals require CS active several clocks before the data transfer. In full-duplex mode, setting SPI_CS_SETUP results in 1.5 SPI clock cycles bet...

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