參數(shù)資料
型號： AD9522-3/PCBZ
廠商： Analog Devices Inc
文件頁數(shù)： 70/84頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR AD9522-3 CLK GEN
設(shè)計資源： AD9522 Eval Board Schematic
AD9522 BOM
標準包裝： 1
主要目的： 計時，時鐘發(fā)生器
嵌入式： 否
已用 IC / 零件： AD9522-3
主要屬性： 12 LVDS/24 CMOS 輸出，2 GHz VCO
次要屬性： I²C & SPI 接口
已供物品： 板
AD9522-3
Rev. 0 | Page 72 of 84
Reg.
Addr
(Hex) Bit(s) Name
Description
[4]
[3]
[2]
[1]
[0]
Level or
Dynamic
Signal
Signal at REFMON Pin
0
1
0
LVL
Holdover active (active high).
0
1
LVL
LD pin comparator output (active high).
1
0
LVL
VS (PLL supply).
1
0
1
DYN
REF1 clock (differential reference when in differential mode).
1
0
1
0
DYN
REF2 clock (not available in differential mode).
1
0
1
DYN
Selected reference to PLL (differential reference when in
differential mode).
1
0
1
0
DYN
Unselected reference to PLL (not available when in differential mode).
1
0
1
0
1
LVL
Status of selected reference (status of differential reference);
active low.
1
0
1
0
LVL
Status of unselected reference (not available in differential mode);
active low.
1
0
1
LVL
Status of REF1 frequency (active low).
1
0
LVL
Status of REF2 frequency (active low).
1
0
1
LVL
(Status of REF1 frequency) AND (status of REF2 frequency).
1
0
1
0
LVL
(DLD) AND (status of selected reference) AND (status of VCO).
1
0
1
LVL
Status of VCO frequency (active low).
1
0
LVL
Selected reference (low = REF2, high = REF1).
1
0
1
LVL
DLD; active low.
1
0
LVL
Holdover active (active low).
1
LVL
LD pin comparator output (active low).
01C
[7]
Disable
switchover
deglitch
Disables or enables the switchover deglitch circuit.
[7] = 0; enable the switchover deglitch circuit (default).
[7] = 1; disable the switchover deglitch circuit.
01C
[6]
Select REF2
If Register 0x01C[5] = 0, selects the reference for PLL when in manual; register selected reference control.
[6] = 0; select REF1 (default).
[6] = 1; select REF2.
01C
[5]
Use REF_SEL
pin
If Register 0x01C[4] = 0 (manual), sets the method of PLL reference selection.
[5] = 0; use Register 0x01C[6] (default).
[5] = 1; use REF_SEL pin.
01C
[4]
Enable
automatic
reference
switchover
Automatic or manual reference switchover. Single-ended reference mode must be selected by
Register 0x01C[0] = 0.
[4] = 0; manual reference switchover (default).
[4] = 1; automatic reference switchover.
Setting this bit also powers on REF1 and REF2, and overrides the settings in Register 0x01C[2:1].
01C
[3]
Stay on REF2
Stays on REF2 after switchover.
[3] = 0; return to REF1 automatically when REF1 status is good again (default).
[3] = 1; stay on REF2 after switchover. Do not automatically return to REF1.
01C
[2]
Enable REF2
This bit turns the REF2 power on. This bit is overridden when automatic reference switchover is enabled.
[2] = 0; REF2 power off (default).
[2] = 1; REF2 power on.
01C
[1]
Enable REF1
This bit turns the REF1 power on. This bit is overridden when automatic reference switchover is enabled.
[1] = 0; REF1 power off (default).
[1] = 1; REF1 power on.
01C
[0]
Enable
differential
reference
Selects the PLL reference mode, differential or single-ended. Register 0x01C[2:1] should be cleared when
this bit is set.
[0] = 0; single-ended reference mode (default).
[0] = 1; differential reference mode.
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