diff options
Diffstat (limited to 'docs/esp8266/general.rst')
| -rw-r--r-- | docs/esp8266/general.rst | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/docs/esp8266/general.rst b/docs/esp8266/general.rst index 44f1526316..cd639532d0 100644 --- a/docs/esp8266/general.rst +++ b/docs/esp8266/general.rst @@ -30,3 +30,29 @@ following design and implementation decision were made: board may expose only subset of pins. Consult your board reference manual. * Some boards may lack external pins/internal connectivity to support ESP8266 deepsleep mode. + + +Technical specifications and SoC datasheets +------------------------------------------- + +The datasheets and other reference material for ESP8266 chip are available +from the vendor site: http://bbs.espressif.com/viewtopic.php?f=67&t=225 . +The are primary reference for the chip technical specifications, capabilities, +operating modes, internal functioning, etc. + +For your convinience, some of technical specifications are provided below: + +* Architecture: Xtensa lx106 +* CPU frequency: 80MHz overclockable to 160MHz +* Total RAM available: 96KB (part of it reserved for system) +* BootROM: 64KB +* Internal FlashROM: None +* External FlashROM: code and data, via SPI Flash. Normal sizes 512KB-4MB. +* GPIO: 16 + 1 (GPIOs are multiplexed with other functions, including + external FlashROM, UART, deep sleep wake-up, etc.) +* UART: One RX/TX UART (no hardware handshaking), one TX-only UART. +* SPI: 2 SPI interfaces (one used for FlashROM). +* I2C: No native extenal I2C (bitbang implementation available on any pins). +* I2S: 1. +* Programming: using BootROM bootloader from UART. Due to external FlashROM + and always-available BootROM bootloader, ESP8266 is not brickable. |