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AD9927 データシート(Datasheet) 34 Page - Analog Devices

部品番号. AD9927
部品情報  14-Bit CCD Signal Processor with V-Driver and Precision TimingTM Generator
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
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AD9927
Rev. 0 | Page 34 of 100
XV1
XV8
HD
XV9
XV10
XV1 TO XV8 USE
V-PATTERN GROUP A
XV9, XV10 USE
V-PATTERN GROUP B
Figure 37. Using Separate Group A and Group B Patterns
XV1
XV24
HD
V-PATTERN GROUP A
V-PATTERN GROUP B
V-PATTERN GROUP C
V-PATTERN GROUP D
Figure 38. Combining Multiple V-Patterns Using CONCAT_GRP = 1
XV1
XV10
HD
V-PATTERN GROUP A V-PATTERN GROUP B
GROUP A REP 1
GROUP A REP 2
GROUP A REP 3
Figure 39. Combining Group A and Group B Patterns with Repetition
Group A/Group B/Group C/Group D Selection
The AD9927 has the flexibility to use four different V-pattern
groups in a vertical sequence. In general, the vertical outputs
use the same V-pattern group during a particular sequence. It
is possible to assign some of the outputs to a different V-pattern
group, which can be useful in certain CCD readout modes.
The GROUPSEL registers are used to select Group A, Group B,
Group C, or Group D for each V-output. In general, only a
single V-pattern group is needed for the vertical outputs;
therefore, Group A should be selected for all outputs by default
(GROUPSEL_0, GROUPSEL_1 = 0x00). In this configuration,
all outputs use the V-pattern group specified by the VPATSELA
register.
If additional flexibility is needed, some outputs can be set to
Group B, Group C, or Group D in the GROUPSEL registers. In
this case, those selected outputs use the V-pattern group
specified by the VPATSELB, VPATSELC, or VPATSELD
registers. Figure 37 shows an example where outputs V9 and
V10 are using a separate V-Pattern Group B to perform special
CCD timing.
Another application of the Group A, Group B, Group C, and
Group D registers is to combine up to four different V-pattern
groups together for more complex patterns. This is accom-
plished by setting the CONCAT_GRP register (Address 0x00,
Bits [13:10]) equal to 0x01. This setting combines the toggle
positions from the V-pattern groups specified by registers
VPATSELA, VPATSELB, VPATSELC, and VPATSELD for a




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