i read datasheep and find CKIL can use internal clock, if i can float CKIL? and how to useinternal clock for CKIL?
The CKIL is used for low-frequency
functions. It supplies the clock for wake-up circuit, power-down real
time clock operation, and slow system and
watch-dog counters. The clock input can be connected to either
external oscillator or a crystal using
internal oscillator amplifier.