User's Manual

8. MAC Addresses and eFuse
8.
MAC Addresses and eFuse
The eFuse in ESP32-S2 has been burnt into 48-bit mac_address. The actual addresses the chip uses in station
and AP modes correspond to mac_address in the following way:
• Station mode: mac_address
• AP mode: mac_address + 1
There are seven blocks in eFuse for users to use. Each block is 256 bits in size and has independent write/read
disable controller. Six of them can be used to store encrypted key or user data, and the remaining one is only used
to store user data.
Espressif Systems
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ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5