1.1.12 Additional Buffers for Improved Operation

The ATECC608B provides new SRAM buffers: Message Digest buffer, Alternate Key buffer and SHA Context buffer. The Message Digest buffer and Alternate Key buffer can be used when the TempKey register holds other information. Multiple buffers allow a reduction in transactions and in the transaction time between the device and the host, by allowing the execution of different commands directly from the buffers.

The ATECC608B supports multiple instances for the SHA calculation with SHA context. The SHA buffer helps the host to perform read and write operations on the SHA context, which enables the host to execute multiple instances of SHA calculations.