Sundance SMT712 - Manual (Page 43)

User Manual SMT712 Page 43 of 89 Last Edited: 11/12/2012 10:36:00
4.6.1.1.15 Clock Generator (AD9516-2) Register 0x17 – PLL Control
2 – 0xE4 (write).
Clock Generator (AD9516-2) Register 0x17 – PLL Control 2 – 0xE4 (write)
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 STATUS Pin control Antibacklash Pulse
Width
Default ‘000000’ ‘00’
Clock Generator (AD9516-2) Register 0x17 – PLL Control 2 – 0xE4 (write)
Setting Bit 7..2 Description (Prescaler)
63 111111 This sequence gives complete control over when the VCO calibration occurs relative to
the programming of other registers that can impact the calibration.
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 DYN Unselected reference to PLL (not available when in differential mode).
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 LD pin comparator output (active high).
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.
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).