7.2.1 Word Address Values

During an I2C write packet, the ATECC608A-TNGLoRaWAN interprets the second byte sent as the word address, which indicates the packet function as it is described in the table below:

Table 7-2. Word Address Values
NameValueDescription
Reset0x00Reset the address counter. The next I2C read or write transaction will start with the beginning of the I/O buffer.
Sleep 
(Low-power)0x01The ATECC608A-TNGLoRaWAN goes into the low-power Sleep mode and ignores all subsequent I/O transitions until the next Wake flag. The entire volatile state of the device is reset.
Idle0x02The ATECC608A-TNGLoRaWAN goes into the Idle mode and ignores all subsequent I/O transitions until the next Wake flag. The contents of TempKey, MessageDigestBuffer, and Alternate Key registers are retained.
Command0x03Write subsequent bytes to sequential addresses in the input command buffer that follow previous writes. This is the normal operation.
Reserved0x04 – 0xFFThese addresses should not be sent to the device.