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ADN2817 Datasheet(PDF) 13 Page - Analog Devices

No. de Pieza. ADN2817
Descripción  Continuous Rate 12.3Mb/s to 2.7Gb/s Clock and Data Recovery ICs
Descarga  35 Pages
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Fabricante  AD [Analog Devices]
Página de inicio  http://www.analog.com
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ADN2817 Datasheet(HTML) 13 Page - Analog Devices

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Preliminary Technical Data
ADN2817/ADN2818
Rev.Pr A | Page 13 of 35
Table 9. Control Register, CTRLB
Config LOL
Reset MISC[4]
System Reset
Reset MISC[2]
D7
D6
D5
D4
D3
D2
D1
D0
0 = LOL pin normal operation
1 = LOL pin is static LOL
Write a 1 followed by
0 to reset MISC[4]
Write a 1 followed by
0 to reset
ADN2817/ADN2818
Set
to 0
Write a 1 followed by
0 to reset MISC[2]
Set
to 0
Set
to 0
Set
to 0
Table 10. Control Register, CTRLC
Signal Degrade Threshold
Signal Degrade Mode
Config LOS
Squelch Mode
D7
D6
D5
D4
D3
D2
D1
D0
0 = Active high LOS
0 = Squelch CLK and
DATA
Set
to 0
Set
to 0
Set
to 0
0=Set SD Threshold to 9mV
1=Set SD Threshold to 1.9x
LOS Threshold
0= Disable Signal Degrade
Mode
1= Enable Signal Degrade
Mode
Set
to 0
1 = Active low LOS
1 = Squelch CLK or
DATA
Table 111. Control Register, CTRLD
CDR Bypass
Disable DATA
Buffer
Disable CLK
Buffer
Initiate PRBS
PRBS Mode
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
Power Down
0=CDR
Enabled
1=CDR
Disabled
0=Data Buffer
Enabled
1=Data Buffer
Disabled
0=CLK Buffer
Enabled
1=CLK Buffer
Disabled
Set
to 0
Write a 1
followed by 0 to
initiate PRBS
Generate
Sequence
0
0
0
1
0
1
1
0
1
0
1
0
Generate Mode
Detect Mode, compares errors
Detect Mode, O/P to BER only
Detect mode, BER not in use
Table 12. FDDI_MODE
FDDI Enable
Subharmonic Ratio [6..2]
D7
D6
D5
D4
D3
D2
D1
D0
0= FDDI Mode Disabled
1= FDDI Mode Enabled
0
0
0
0
1 =
1
0
0
0
1
0
= 2
0
0
0
1
1
= 3
---------------------
1
1
1
1
1
= 31
Set to 0
Set to 0
Table 13. SEL_MODE
Mode Control 2
Mode Control 1
Mode Control 0
Clock Holdover
Mode 2A
Clock Holdover
Mode 2B
D7
D6
D5
D4
D3
D2
D1
D0
Set
to 0
Set
to 0
0=LTD/LTR Mode
1=LTR Mode Only
0= Continuous Rate
1= Single Rate
0= Full Range (12.3M-
2.7G)
1= Limited Range
Set to 1 for Clock
Holdover Mode 2A
Set to 1 for Clock
Holdover Mode 2B
Set
to 0


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