2.1 EEPROM Data Zone

The data zone is made up of four slots of differing sizes with predefined uses. Table 1 defines how each slot can be used. Slot 0 is always locked and stores an ECC Private key. Slots 1 to 3 are individually lockable.

Table 2-3. Data Zone
Slot	Blocks	Bytes	Bits	Use	Notes
0	1	32	256	Primary ECC Private Key	No read/write access
1	10	320	2560	Device and Signer compressed certificate	Writes allowed unless slot is locked. Slot is always readable.
2	2	64	512	General Data Storage	Writes allowed unless slot is locked. Slot is always readable.
3	1	32	256	HMAC Secret Key	Writes allowed unless slot is locked. No read access.