AD9992 データシートの表示（PDF） - Analog Devices
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AD9992 Datasheet PDF : 92 Pages
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POSITION
CLI
RG
H1
1
2
H1, H3
H2, H4
3
4
H5, H7
H6, H8
H1 TO H8 PROGRAMMABLE EDGES:
1H1 RISING EDGE.
2H1 FALLING EDGE.
3H5 RISING EDGE.
4H5 FALLING EDGE.
Figure 18. HCLK Mode 3 Operation
P[0]
P[16]
P[32]
RGr[0]
RGf[16]
H1r[0]
tSHDINH
H1f[32]
P[48]
P[64] = P[0]
48
63
tSHDINH
AD9992
H2
tS2
tS1
CCD
SIGNAL
SHP
SHPLOC[32]
tSHPINH
SHD
SHDLOC[0]
DOUTPHASEP
1
12
tDOUTINH
NOTES:
1. ALL SIGNAL EDGES ARE FULLY PROGRAMMABLE TO ANY OF THE 64 POSITIONS WITHIN ONE PIXEL PERIOD.
TYPICAL POSITIONS FOR EACH SIGNAL ARE SHOWN. HCLK MODE 1 IS SHOWN.
2. CERTAIN POSITIONS SHOULD BE AVOIDED FOR EACH SIGNAL, SHOWN ABOVE AS INHIBIT REGIONS.
3. IF A SETTING IN THE INHIBIT REGION IS USED, AN UNSTABLE PIXEL SHIFT CAN OCCUR IN THE HBLK LOCATION OR AFE PIPELINE.
4. THE tSHPINH AREA FROM 50 TO 62 ONLY APPLIES IN SLAVE MODE.
5. THE tSHDINH AREA WLL APPLY TO EITHER H1 RISING OR FALLING EDGE, DEPENDING ON THE VALUE OF THE
H1HBLK MASKING POLARITY.
6. THE tSHDINH AREA CAN ALSO BE CHANGED TO A tSHPINH AREA IF THE H1HBLKRETIME BIT = 1.
Figure 19. High Speed Timing Default Locations
Digital Data Outputs
The AD9992 data output and DCLK phase are programmable
using the DOUTPHASE registers (Address 0x38, Bits [11:0]).
DOUTPHASEP (Bits [5:0]) selects any edge location from 0 to
63, as shown in Figure 20. DOUTPHASEN (Bits [11:6]) does
not actually program the phase of the data outputs but is used
internally and should always be programmed to a value of
DOUTPHASEP plus 32 edges. For example, if DOUTPHASEP
is set to 0, DOUTPHASEN should be set to 32 (0x20).
Normally, the DOUT and DCLK signals track in phase, based
on the contents of the DOUTPHASE registers. The DCLK output
phase can also be held fixed with respect to the data outputs by
changing the DCLKMODE register high (Address 0x38, Bit 12). In
this mode, the DCLK output remains at a fixed phase equal to a
delayed version of CLI while the data output phase is still
programmable.
The pipeline delay through the AD9992 is shown in Figure 21.
After the CCD input is sampled by SHD, there is a 16-cycle
delay until the data is available.
Rev. C | Page 17 of 92
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