HMC701LP6CE Datasheet, PDF (43/46 Pages) Hittite Microwave Corporation – 8 GHz 16-Bit Fractional-N Synthesizer

v03.0709
HMC701LP6CE
8 GHz 16-Bit Fractional-N Synthesizer
11
Table 36. Reg 1Ah Lock Detect Register
Bit
Type
Name
9:0
R/W lkd_wincnt_max
10
R/W lkd_win_asym_enable
11
R/W lkd_win_asym_up_select
12
R/W lkd_to_sdo_automux_en
13
R/W lkd_to_sdo_always
14
16:15
18:17
19
R/W
R/W
R/W
R/W
lkd_ringosc_mono_select
lkd_ringosc_cfg
lkd_monost_duration
lkd_ringosc_testmode
Default
10’d40
0
0
0
0
0
0
0
0
Description
threshold count in the timer window to declare
lock (reference cycles)
Enables asymmetric lock detect window (nominal
10nsec)
Sets polarity of the window
Muxes the lkd output signal to SDO when SDO is
not being used for Main Serial Port Data Outputs
(Read Operation)
Muxes the lkd output signal to SDO always, not
possible to do Main Serial Port Read in this state
1 select ringosc based oneshot for lock detect
window
0 selects analog based oneshot
“00” fastest “11” slowest
“00” shortest “11” longest
enables the ring osc by itself for testing
11 - 44
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