The datasheet explicitly states that when using external clock TTl rules need to be followed.
"If an external clock is used, it should be a TTL-compatible signal
and must not be halted, changed, or operated below the specified
frequency during normal operation."
TTL is about 5V. How is that possible. Also the eval board shows a clock with 3.3V.
AM I getting something wring here. Kindly assist me pls.