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參數資料
| 型號： | AD9942BBCZRL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費家電 |
| 英文描述： | Dual-Channel, 14-Bit CCD Signal Processor with Precision Timing⑩ Core |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA100 |
| 封裝： | 9 X 9 MM, LEAD FREE, MO-205AB, CSPBGA-100 |
| 文件頁數： | 22/36頁 |
| 文件大小： | 452K |
| 代理商： | AD9942BBCZRL |
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AD9942
CHANNEL A AND CHANNEL B HORIZONTAL CLAMPING AND BLANKING
The AD9942 horizontal clamping and blanking pulses are fully
programmable to suit a variety of applications. Individual
sequences are defined for each signal, which are then organized
into multiple regions during image readout. This allows the
dark pixel clamping and blanking patterns to be changed at
each stage of the readout to accommodate different image
transfer timing and high speed line shifts.
Rev. A | Page 22 of 36
INDIVIDUAL CLPOB AND PBLK SEQUENCES
The AFE horizontal timing consists of CLPOB and PBLK, as
shown in Figure 21. These two signals are independently
programmed using the parameters shown in Table 19. The start
polarity, first toggle position, and second toggle position are
fully programmable for each signal. The CLPOB and PBLK
signals are active low and should be programmed accordingly.
Up to four individual sequences can be created for each signal.
INDIVIDUAL HBLK SEQUENCES
The HBLK programmable timing, shown in Figure 22, is similar
to CLPOB and PBLK. However, there is no start polarity
control. Only the toggle positions are used to designate the start
and stop positions of the blanking period. Additionally, there is
a polarity control, HBLKMASK, which designates the polarity
of the horizontal clock signal H1 during the blanking period.
Setting HBLKMASK high sets H1 low and H2 high during the
blanking, as shown in Figure 23. Up to four individual
sequences are available for HBLK.
Table 19. Channel A and Channel B CLPOB and PBLK Individual Sequence Parameters
Length
(Bit)
Range
Polarity
1
High/low
Toggle Position 1
12
0 to 4095 pixel locations
Toggle Position 2
12
0 to 4095 pixel locations
Parameter
Description
Starting polarity of CLPOB and PBLK pulses for Sequences 0 to 3.
First toggle position within the line for Sequences 0 to 3.
Second toggle position within the line for Sequences 0 to 3.
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