lc72136 Sanyo Semiconductor Corporation, lc72136 Datasheet - Page 19

• Manufacturer Part Number: lc72136
• Description: Frequency Synthesizer Electronic Tuning
• Manufacturer: Sanyo Semiconductor Corporation

2. Unlock Detection Software
3. When Outputting Unlock Data Using Serial Data Output:
Once the LC72136 detects an unlocked state, it does not reset the unlock data (UL) until the next data output (or data
input) operation is performed. At the data output
the unlock data remains set to the unlocked state since no data output has been performed since the value of N was
changed. Thus, even though the frequency became stable (locked), from the point of view of the data, the circuit is in
the unlocked state. Therefore, the data output
a dummy data, and the data from the second data output (data output ) and later outputs should be seen as valid
data.
Lock Determination Flowchart
LC72136, 72136M
immediately following a change to the value of N should be seen as
point in Figure 3, although the VCO frequency is stable (locked),
Figure 3
No. 5038-19/23