ESP8266 Obsolete
Boot Process
- Reset vector is 0x40000080.
- Boots into Espressif code in IROM0.
- Loads SPI ROM data.
- Starts executing ESP SDK-code shadowed SPI ROM (unconfirmed).
SPI Flash ROM Layout
| Address | Size | Name | Description |
|---|---|---|---|
| 00000h | 248k | app.v6.flash.bin | User application |
| 3E000h | 8k | master_device_key.bin | OTA device key |
| 40000h | 240K | app.v6.irom0text.bin | SDK libraries |
| 7C000h | 8k | esp_init_data_default.bin | Default configuration |
| 7E000h | 8k | blank.bin | Filled with FFh. May be WiFi configuration. |