U124 · M5Stack
Unit ID is an encryption coprocessor with hardware-based secure key storage, integrating the ATECC608B hardware encryption chip and using the I2C communication interface. The chip has a built-in 10Kb EEPROM, which can be used to store keys, certificates, data, consumption records, and security configurations. By restricting access policies to memory areas, the configuration can be locked to prevent changes. Each ATECC608B comes with a guaranteed unique 72-bit serial number and includes… (M5Stack U124)
| Part number | U124 |
|---|---|
| Manufacturer | M5Stack |
| Category | Interface & Expansion › Security & Crypto |
| Pins | 4 |
| Resolution | 72 bit |
Crypto Authentication Unit (ATECC608B) pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | SCL | input | |
| 2 | SDA | bidirectional | |
| 3 | 5V | power | |
| 4 | GND | ground |
Schematic symbol and footprint
Schematic symbol
Footprint: Grove HY2.0 4-pin through-hole, 2.0 mm pitch — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
