Sundance SMT712 - Manual (Page 46)

User Manual SMT712 Page 46 of 89 Last Edited: 11/12/2012 10:36:00
4.6.1.1.18 Clock Generator (AD9516-2) Register 0x1A – PLL Control
5 – 0xF0 (write).
Clock Generator (AD9516-2) Register 0x1A – PLL Control 5 – 0xF0 (write)
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Reserved Reference
Frequency
Monitor
Threshold
LD pin control (5…0)
Default ‘0’ ‘0’ ‘00000’
Clock Generator (AD9516-2) Register 0x1A – PLL Control 5 – 0xF0 (write)
Setting Bit 6 Description (B Counter)
0 0 frequency valid if frequency is above the higher frequency threshold.
1 1 frequency valid if frequency is above the lower frequency threshold.
Setting Bit 5..0 Description (LD pin control)
63 111111 LVL N/A—do not use.
62 111110 LVL Holdover active (active low).
61 111101 LVL Digital lock detect (DLD); active low.
60 111100 LVL Selected reference (low = REF2, high = REF1).
59 111011 LVL Status of VCO frequency (active low).
58 111010 LVL (DLD) AND (Status of selected reference) AND (Status of VCO).
57 111001 LVL (Status of REF1 frequency) AND (Status of REF2 frequency).
56 111000 LVL Status of REF2 frequency (active low).
55 110111 LVL Status of REF1 frequency (active low).
54 110110 LVL Status of unselected reference (not available in differential mode); active low.
53 110101 LVL Status of selected reference (status of differential reference);active low.
52 110100 DYN Unselected reference to PLL (not available when in differential mode).
51 110011 DYN Selected reference to PLL (differential reference when in differential mode).
50 110010 DYN REF2 clock (not available in differential mode).
49 110001 DYN REF1 clock (differential reference when in differential mode).
48 110000 LVL VS (PLL supply).
47 101111 LVL N/A—do not use.
46 101110 LVL Holdover active (active high).
45 101101 LVL Digital lock detect (DLD); active high.
44 101100 LVL Selected reference (low = REF1, high = REF2).
43 101011 LVL Status of VCO frequency (active high).
42 101010 LVL (DLD) AND (status of selected reference) AND (status of VCO).
41 101001 LVL (Status REF1 frequency) AND (status REF2 frequency).
40 101000 LVL Status REF2 frequency (active high).
39 100111 LVL Status REF1 frequency (active high).
38 100110 LVL Status of unselected reference (not available in differential mode); active high.
37 100101 LVL Status of selected reference (status of differential reference); active high.