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AD6679 Scheda tecnica(PDF) 66 Page - Analog Devices

Il numero della parte AD6679
Spiegazioni elettronici  135 MHz BW IF Diversity Receiver
PDF  82 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD6679 Scheda tecnica(HTML) 66 Page - Analog Devices

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Data Sheet
AD6679
Rev. B | Page 65 of 81
SYNC± SETUP AND HOLD WINDOW MONITOR
To assist in ensuring a valid SYNC± capture, the AD6679 has a
SYNC± setup and hold window monitor. This feature allows the
system designer to determine the location of the SYNC± signals
relative to the CLK± signals by reading back the amount of
setup and hold margin on the interface through the memory
map. Figure 85 and Figure 86 show both the setup and hold
status values, respectively, for different phases of SYNC±. The
setup detector returns the status of the SYNC± signal before the
CLK± edge and the hold detector returns the status of the
SYNC± signal after the CLK± edge. Register 0x128 stores the
status of SYNC± and indicates whether the SYNC± signal was
captured by the ADC.
VALID
REG 0x128[3:0]
CLK±
INPUT
SYNC±
INPUT
FLIP FLOP
HOLD (MIN)
FLIP FLOP
HOLD (MIN)
FLIP FLOP
SETUP (MIN)
–1
–2
–3
–4
–5
–6
–7
–8
7
6
5
4
3
2
1
0
Figure 85. SYNC ± Setup Detector



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