ESP32: Difference between revisions

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* chip data sheet: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
* chip data sheet: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf


** ESP32-D0WDQ6 chip
Information from the data sheets:
*** Xtensa® 32-bit LX6 microprocessors. The internal memory includes:
 
*** 448 KB of ROM for booting and core functions.
* ESP32-D0WDQ6 chip
*** 520 KB of on-chip SRAM for data and instructions.
** Xtensa® 32-bit LX6 microprocessors. The internal memory includes:
*** 8 KB of SRAM in RTC, which is called RTC FAST Memory and can be used for data storage; it is accessed by the main CPU during RTC Boot from the Deep-sleep mode.
** 448 KB of ROM for booting and core functions.
*** 8 KB of SRAM in RTC, which is called RTC SLOW Memory and can be accessed by the co-processor during the Deep-sleep mode.
** 520 KB of on-chip SRAM for data and instructions.
*** 1 Kbit of eFuse: 256 bits are used for the system (MAC address and chip configuration) and the remaining 768 bits are reserved for customer applications, including flash-encryption and chip-ID.
** 8 KB of SRAM in RTC, which is called RTC FAST Memory and can be used for data storage; it is accessed by the main CPU during RTC Boot from the Deep-sleep mode.
** Recommended OS is FreeRTOS with LwIP
** 8 KB of SRAM in RTC, which is called RTC SLOW Memory and can be accessed by the co-processor during the Deep-sleep mode.
** Wifi 802.11 b/g/n (802.11n up to 150 Mbps), at 2.5 GHz
** 1 Kbit of eFuse: 256 bits are used for the system (MAC address and chip configuration) and the remaining 768 bits are reserved for customer applications, including flash-encryption and chip-ID.
** Bluetooth v4.2 BR/EDR and BLE specification
* Recommended OS is FreeRTOS with LwIP
** power 3.3 V, 80 mA typical, up to 500 mA
* Wifi 802.11 b/g/n (802.11n up to 150 Mbps), at 2.5 GHz
** pins connected to internal SPI flash: SCK/CLK, SDO/SD0, SDI/SD1, SHD/SD2, SWP/SD3 and SCS/CMD
* Bluetooth v4.2 BR/EDR and BLE specification
** pins MTDI, GPIO0, GPIO2, MTDO, GPIO5 are ”GPIO_STRAPPING" set the boot mode
* power 3.3 V, 80 mA typical, up to 500 mA
* pins connected to internal SPI flash: SCK/CLK, SDO/SD0, SDI/SD1, SHD/SD2, SWP/SD3 and SCS/CMD
* pins MTDI, GPIO0, GPIO2, MTDO, GPIO5 are ”GPIO_STRAPPING" set the boot mode


Information from adafruit: https://www.adafruit.com/product/3405 and https://learn.adafruit.com/adafruit-huzzah32-esp32-feather
Information from adafruit: https://www.adafruit.com/product/3405 and https://learn.adafruit.com/adafruit-huzzah32-esp32-feather

Revision as of 13:22, 26 March 2020

= General information and links

Adafruit HUZZA32

    • USB power connector
    • connection for external 3.7 V battery, charged from USB
    • serial IO 3.3V RX+TX
    • 1x SPI (where is the rest?)
    • 1x I2C (where is the rest?)
    • 7 GPIO top, shared with 2 DACs and 6 ADCs
    • 7 GPIO bottom, shared with 7 ADCs and other functions
    • everything is 3.3V, *NOT* 5V safe
    • there is ADC1 and ADC2, not clear what it means, ADC voltage range not clear
    • ADC1 or ADC2 cannot be used with Wifi (this is unclear)
    • ESP32 SD card interface not connected
    • ESP32 serial IO connected to USB via USB-serial-bridge chip (the best I can tell)
    • power is USB with battery backup, one header pin provides regulated 3.3 V power to user (available current not clear, maybe 250 mA), battery voltage is on A13

ESP-WROOM-32 module

Information from the data sheets:

  • ESP32-D0WDQ6 chip
    • Xtensa® 32-bit LX6 microprocessors. The internal memory includes:
    • 448 KB of ROM for booting and core functions.
    • 520 KB of on-chip SRAM for data and instructions.
    • 8 KB of SRAM in RTC, which is called RTC FAST Memory and can be used for data storage; it is accessed by the main CPU during RTC Boot from the Deep-sleep mode.
    • 8 KB of SRAM in RTC, which is called RTC SLOW Memory and can be accessed by the co-processor during the Deep-sleep mode.
    • 1 Kbit of eFuse: 256 bits are used for the system (MAC address and chip configuration) and the remaining 768 bits are reserved for customer applications, including flash-encryption and chip-ID.
  • Recommended OS is FreeRTOS with LwIP
  • Wifi 802.11 b/g/n (802.11n up to 150 Mbps), at 2.5 GHz
  • Bluetooth v4.2 BR/EDR and BLE specification
  • power 3.3 V, 80 mA typical, up to 500 mA
  • pins connected to internal SPI flash: SCK/CLK, SDO/SD0, SDI/SD1, SHD/SD2, SWP/SD3 and SCS/CMD
  • pins MTDI, GPIO0, GPIO2, MTDO, GPIO5 are ”GPIO_STRAPPING" set the boot mode

Information from adafruit: https://www.adafruit.com/product/3405 and https://learn.adafruit.com/adafruit-huzzah32-esp32-feather 

  - 240 MHz CPU, 520 kbytes SRAM, Wifi, Bluetooth, 4 Mbyte flash, interface for SD card.
  - 3x UART
  - 3x SPI
  - 2x I2C
  - 12 ADC inputs
  - 2 DAC
  - more goodies
  - everything is 3.3V, *NOT* 5V safe
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