AD9517-2 Analog Devices, Inc., AD9517-2 Datasheet - Page 74
AD9517-2
Manufacturer Part Number
AD9517-2
Description
12-output Clock Generator With Integrated 2.2 Ghz Vco
Manufacturer
Analog Devices, Inc.
Datasheet
1.AD9517-2.pdf
(80 pages)
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Reg.
Addr
(Hex) Bit(s) Name
190
190
191
191
191
191
191
192
192
196
196
197
197
197
Reg.
Addr
(Hex) Bit(s) Name
143
143
AD9517-2
Table 57. LVPECL Channel Dividers
<7:4> Divider 0 Low Cycles
<3:0> Divider 0 High Cycles
<7>
<6>
<5>
<4>
<3:0> Divider 0 Phase Offset
<1>
<0>
<7:4> Divider 1 Low Cycles
<3:0> Divider 1 High Cycles
<7>
<6>
<5>
<2:1> OUT7 LVDS Output Current
<0>
OUT7 Power-Down
Divider 0 Bypass
Divider 0 Nosync
Divider 0 Force High
Divider 0 Start High
Divider 0 Direct to Output
Divider 0 DCCOFF
Divider 1 Bypass
Divider 1 Nosync
Divider 1 Force High
Description
Number of clock cycles of the divider input during which divider output stays low.
Number of clock cycles of the divider input during which divider output stays high.
Bypass and power-down the divider; route input to divider output.
<7> = 0; use divider.
<7> = 1; bypass divider.
Nosync.
<6> = 0; obey chip-level SYNC signal.
<6> = 1; ignore chip-level SYNC signal.
Force divider output to high. This requires that nosync also be set.
<5> = 0; divider output forced to low.
<5> = 1; divider output forced to high.
Selects clock output to start high or start low.
<4> = 0; start low.
<4> = 1; start high.
Phase offset.
Connect OUT0 and OUT1 to Divider 0 or directly to VCO or CLK.
<1> = 0: OUT0 and OUT1 are connected to Divider 0.
<1> = 1:
If 0x1E1<1:0> = 10b, the VCO is routed directly to OUT0 and OUT1.
If 0x1E1<1:0> = 00b, the CLK is routed directly to OUT0 and OUT1.
If 0x1E1<1:0> = 01b, there is no effect.
Duty-cycle correction function.
<0> = 0; enable duty-cycle correction.
<0> = 1; disable duty-cycle correction.
Number of clock cycles of the divider input during which divider output stays low.
Number of clock cycles of the divider input during which divider output stays high.
Bypass and power-down the divider; route input to divider output.
<7> = 0; use divider.
<7> = 1; bypass divider.
Nosync.
<6> = 0; obey chip-level SYNC signal.
<6> = 1; ignore chip-level SYNC signal.
Force divider output to high. This requires that nosync also be set.
<5> = 0; divider output forced to low.
<5> = 1; divider output forced to high.
Description
Set output current level in LVDS mode. This has no effect in CMOS mode.
<2> <1> Current (mA)
0
0
1
1
Power-down output (LVDS/CMOS).
<0> = 0; power on.
<0> = 1; power off.
0
1
0
1
1.75
3.5
5.25
7
Rev. 0 | Page 74 of 80
Recommended Termination (Ω)
100
100
50
50
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