Sundance SMT712 - Manual (Page 47)

User Manual SMT712 Page 47 of 89 Last Edited: 11/12/2012 10:36:00
36 100100 DYN Unselected reference to PLL (not available in differential mode).
35 100011 DYN Selected reference to PLL (differential reference when in differential mode).
34 100010 DYN REF2 clock (N/A in differential mode).
33 100001 DYN REF1 clock (differential reference when in differential mode).
32 100000 LVL Ground (dc).
0xxxxx LVL Ground (dc); for all other cases of 0XXXXX not specified above. The selections that
follow are the same as REFMON.
4 000100 CUR Current source lock detect (110 ìA when DLD is true).
3 000011 HIZ High-Z LD pin.
2 000010 DYN N-channel, open-drain lock detect (analog lock detect).
1 000001 DYN P-channel, open-drain lock detect (analog lock detect).
0 000000 LVL Digital lock detect (high = lock, low = unlock).
LVL stands for Level and DYN for dynamic
4.6.1.1.19 Clock Generator (AD9516-2) Register 0x1B – PLL Control
6 – 0xF4 (write).
Clock Generator (AD9516-2) Register 0x1B – PLL Control 6 – 0xF4 (write)
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 VCO Freq
Monitor
REF2 Freq
Monitor
REF1 Freq
Monitor
REFMON Pin Control
Default ‘0’ ‘0’ ‘0’ ‘00000’
Clock Generator (AD9516-2) Register 0x1B – PLL Control 6 – 0xF4 (write)
Setting Bit 7 Description (VCO Freq Monitor)
0 0 disable VCO frequency monitor.
1 1 enable VCO frequency monitor.
Setting Bit 6 Description (REF2 Frequency Monitor)
0 0 disable REF2 frequency monitor.
1 1 enable REF2 frequency monitor.
Setting Bit 5 Description (REF1 Frequency Monitor)
0 0 disable REF1 (REFIN) frequency monitor.
1 1 enable REF1 (REFIN) frequency monitor.
Setting Bit 4..0 Description (REFMON Pin Control)
31 11111 LVL LD pin comparator output (active low).
30 11110 LVL Holdover active (active low).
29 11101 LVL Digital lock detect (DLD); active low.
28 11100 LVL Selected reference (low = REF2, high = REF1).
27 11011 LVL Status of VCO frequency (active low).
26 11010 LVL (DLD) AND (Status of selected reference) AND (Status of VCO).
25 11001 LVL (Status of REF1 frequency) AND (Status of REF2 frequency).
24 11000 LVL Status of REF2 frequency (active low).
23 10111 LVL Status of REF1 frequency (active low).
22 10110 LVL Status of unselected reference (not available in differential mode);active low.
21 10101 LVL Status of selected reference (status of differential reference);active low.