8.3.1 I/O Timeout

After a leading transition for any data token has been received, the ATECC608B-TFLXTLS will expect both the completion of the token and the start of the next (if this is not the last token of the group) to be properly received by the device within the t_TIMEOUT-SWI interval. Failure to send enough bits, or the transmission of an illegal token (e.g. a low pulse exceeding t_ZLO), will cause the device to enter the Sleep mode after the t_TIMEOUT-SWI interval.

The same timeout applies during the transmission of the command group. After the transmission of a legal command flag, the I/O Timeout Circuitry is enabled until the last expected data bit is received.

Important: The Timeout Counter is reset after every legal token; therefore, the total time to transmit the command may exceed the t_TIMEOUT-SWI interval while the time between bits may not.

The I/O timeout circuitry is disabled when the device is busy executing a command.