參數(shù)資料
型號: AD9991KCPRL
廠商: ANALOG DEVICES INC
元件分類: 消費家電
英文描述: 10-Bit CCD Signal Processor with Precision Timing Generator
中文描述: SPECIALTY CONSUMER CIRCUIT, QCC56
封裝: 8 X 8 MM, MO-220-VLLD-2, LFCSP-56
文件頁數(shù): 14/60頁
文件大?。?/td> 826K
代理商: AD9991KCPRL
AD9991
–14–
HD
HBLK
PROGRAMMABLE SETTINGS:
1. FIRST TOGGLE POSITION = START OF BLANKING
2. SECOND TOGGLE POSITION = END OF BLANKING
BLANK
BLANK
1
2
Figure 10. Horizontal Blanking (HBLK) Pulse Placement
HD
HBLK
THE POLARITY OF H1 DURING BLANKING IS PROGRAMMABLE (H2 IS OPPOSITE POLARITY OF H1).
H1/H3
H1/H3
H2/H4
Figure 11. HBLK Masking Control
HBLK
SPECIAL H-BLANK PATTERN IS CREATED USING MULTIPLE HBLK TOGGLE POSITIONS
H1/H3
H2/H4
TOG1
TOG2
TOG3
TOG4
TOG5
TOG6
Figure 12. Generating Special HBLK Patterns
Generating Special HBLK Patterns
There are six toggle positions available for HBLK. Normally,
only two of the toggle positions are used to generate the standard
HBLK interval. However, the additional toggle positions may be
used to generate special HBLK patterns, as shown in Figure 12.
The pattern in this example uses all six toggle positions to gen-
erate two extra groups of pulses during the HBLK interval. By
changing the toggle positions, different patterns can be created.
Generating HBLK Line Alternation
One further feature of the AD9991 is the ability to alternate dif-
ferent HBLK toggle positions on odd and even lines. This may be
used in conjunction with V-pattern odd/even alternation or on its
own. When a 1 is written to the HBLKALT register, TOG1 and
TOG2 are used on odd lines only, while TOG3–TOG6 are used
on even lines. Writing a 2 to the HBLKALT register gives the
opposite result: TOG1 and TOG2 are used on even lines, while
TOG3–TOG6 are used on odd lines. See the Vertical Timing
Generation, Line Alternation section for more information.
REV. 0
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AD9991KCP 10-Bit CCD Signal Processor with Precision Timing Generator
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