esp8266_memory_map
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esp8266_memory_map [2014/12/31 02:27] admin created |
esp8266_memory_map [2014/12/31 03:28] admin |
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| + | ** please someone fix up this page, needs an edit! ** | ||
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| ====== ESP8266 Memory Map ====== | ====== ESP8266 Memory Map ====== | ||
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| The reset vector is 40000080h, which maps to internal ROM. | The reset vector is 40000080h, which maps to internal ROM. | ||
| - | ==== Memory Layout ==== | + | ===== Memory Layout ===== |
| - | ------------- | ||
| | Address | Name | Size | Type | R/W | Description | | | Address | Name | Size | Type | R/W | Description | | ||
| - | | ---------:| ------ | ----------:|:----:| --- | ----------- | | ||
| | 00000000h | | | Exc | | Causes fault when reading. | | 00000000h | | | Exc | | Causes fault when reading. | ||
| | 20000000h | | | No | | Unmapped, repeated pattern of 00 80 00 00. | | 20000000h | | | No | | Unmapped, repeated pattern of 00 80 00 00. | ||
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| | Address | Size | Name | Description | | | Address | Size | Name | Description | | ||
| - | | ------- | ---- | ------------------------- | --------------------- | | ||
| | 00000h | 248k | app.v6.flash.bin | User application | | 00000h | 248k | app.v6.flash.bin | User application | ||
| | 3E000h | 8k | master_device_key.bin | OTA device key. *Unconfirmed:* Not used without OTA | | 3E000h | 8k | master_device_key.bin | OTA device key. *Unconfirmed:* Not used without OTA | ||
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| | Address | Size | Name | Description | | | Address | Size | Name | Description | | ||
| - | | ------- | ---- | --------------------- | ------------------------ | | ||
| | 00000h | 4k | boot.bin | Bootloader | | | 00000h | 4k | boot.bin | Bootloader | | ||
| | 01000h | 64k | app.v6.flash1.bin | User application, slot 1 | | | 01000h | 64k | app.v6.flash1.bin | User application, slot 1 | | ||
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| | 7E000h | 8k | blank.bin | Filled with FFh. May be WiFi configuration. | | | 7E000h | 8k | blank.bin | Filled with FFh. May be WiFi configuration. | | ||
| - | === Exception Vectors === | + | ==== Exception Vectors ==== |
| | Address | Name | | | Address | Name | | ||
| - | | --------- | --------------- | | ||
| | 40000010h | DebugException | | | 40000010h | DebugException | | ||
| | 40000020h | NMIException | | | 40000020h | NMIException | | ||
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| | Base Address | Size | Name | Description | | Base Address | Size | Name | Description | ||
| - | | ------------:| ----:| ----- | --------------- | ||
| | 60000000h | 80h | uart0 | The UART0 config registers, see `examples/IoT_Demo/include/drivers/uart_register.h` | | 60000000h | 80h | uart0 | The UART0 config registers, see `examples/IoT_Demo/include/drivers/uart_register.h` | ||
| | 60000100h | 100h | spi1 | *Unconfirmed:* The SPI controller registers, see examples/IoT_Demo/include/driver/spi_register.h | | 60000100h | 100h | spi1 | *Unconfirmed:* The SPI controller registers, see examples/IoT_Demo/include/driver/spi_register.h | ||
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| ### iomux Pin Registers (60000804h–60000843h) | ### iomux Pin Registers (60000804h–60000843h) | ||
| - | ``` | ||
| 31 24 16 8 0 | 31 24 16 8 0 | ||
| -------- -ffff--- -------- ud--UDEe | -------- -ffff--- -------- ud--UDEe | ||
| Line 104: | Line 99: | ||
| |`- Pull-down | |`- Pull-down | ||
| `- Pull-up | `- Pull-up | ||
| - | ``` | ||
| - | References | + | |
| - | ---------- | + | === References === |
| - [Forum post Memory Layout, p274](http://www.esp8266.com/viewtopic.php?f=5&t=9&start=30#p274) | - [Forum post Memory Layout, p274](http://www.esp8266.com/viewtopic.php?f=5&t=9&start=30#p274) | ||
| - [Forum post Firmware Dump, p263](http://www.esp8266.com/viewtopic.php?f=6&t=39&start=10#p263) | - [Forum post Firmware Dump, p263](http://www.esp8266.com/viewtopic.php?f=6&t=39&start=10#p263) | ||
esp8266_memory_map.txt · Last modified: 2015/07/26 19:48 by dkinzer