SI5325C-C-GM Datasheet, PDF (68/178 Pages) Silicon Laboratories – ANY-FREQUENCY PRECISION CLOCKS

Si53xx-RM
6.2.5. Clock Output Behavior Before and During ICAL (Si5319, Si5324, Si5326, Si5327, Si5328, Si5368,
Si5369, Si5374, Si5375, and Si5376)
Table 28. CKOUT_ALWAYS_ON and SQ_ICAL Truth Table
Cases
1¹
CKOUT_ALWAYS_ON SQ_ICAL
Results
0
0
CKOUT OFF until after the first ICAL
2²
0
3³
1
1
CKOUT OFF until after the first successful
ICAL (i.e., when LOL is low)
0
CKOUT always ON, including during an ICAL
4⁴
1
1
CKOUT always ON, including during an ICAL.
Use these settings to preserve output-to-output skew
Notes:
1. Case 1 should be selected when an output clock is not desired until the part has been initialized after power-up, but is
desired all of the time after initialization.
2. Case 2 should be selected when an output clock is never desired during an any ICAL. Case 2 will only generate
outputs when the outputs are at the correct output frequency.
3. Case 3 should be selected whenever a clock output is always desired.
4. Case 4 is the same as Case 3.
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Rev. 1.2