Data Sheet
Table Of Contents
- 1 Module Overview
- 2 Block Diagram
- 3 Pin Definitions
- 4 Electrical Characteristics
- 5 Schematics
- 6 Peripheral Schematics
- 7 Physical Dimensions and PCB Layout
- 8 Product Handling
- 9 MAC Addresses and eFuse
- 10 Learning Resources
- Revision History
9 MAC Addresses and eFuse
9 MAC Addresses and eFuse
The eFuse in ESP32 has been burnt into 48-bit mac_address. The actual addresses the chip uses in station, AP,
BLE, and Ethernet modes correspond to mac_address in the following way:
• Station mode: mac_address
• AP mode: mac_address + 1
• BLE mode: mac_address + 2
• Ethernet mode: mac_address + 3
In the 1 Kbit 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.
Espressif Systems 31
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ESP32-WROOM-32E & ESP32-WROOM-32UE Datasheet v1.2