參數(shù)資料
型號(hào)： AD9992BBCZRL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 29/92頁(yè)
文件大?。?/td> 0K
描述： IC CCD SGNL PROC 12BIT 105CSPBGA
產(chǎn)品變化通告： AD9992 Discontinuation 22/Feb/2012
標(biāo)準(zhǔn)包裝： 2,000
類型： CCD 信號(hào)處理器，12 位
輸入類型： 邏輯
輸出類型： 邏輯
接口： 3 線串口
電流 - 電源： 27mA
安裝類型： 表面貼裝
封裝/外殼： 105-LFBGA，CSPBGA
供應(yīng)商設(shè)備封裝： 105-CSPBGA（8x8）
包裝： 帶卷 (TR)
AD9992
Rev. C | Page 35 of 92
Using the LASTREPLEN_EN
The LASTREPLEN_EN register (Address 0x00, Bits [19:16] in
the sequence registers) is used to enable a separate pattern
length to be used in the final repetition of several pulse
repetitions. It is recommended that the LASTREPLEN_EN
register bits be set high (enabled) and the LASTREPLEN_A,
LASTREPLEN_B, LASTREPLEN_C, and LASTREPLEN_D
registers be set to a value equal to the VLENA, VLENB,
VLENC, and VLEND register values, respectively.
Generating Line Alternation for V-Sequences and HBLK
During low resolution readout, some CCDs require a different
number of vertical clocks on alternate lines. The AD9992 can
support this by using the VREP registers. This allows a different
number of V-pattern group repetitions to be programmed on
odd and even lines. Only the number of repeats can be different
in odd and even lines, while the V-pattern group remains the same.
There are separate controls for the assigned Group A, Group B,
Group C, and Group D patterns. All groups can support odd and
even line alternation. Group A uses the VREPA_1 register and
the VREPA_2 register; Group B, Group C, and Group D use
the corresponding VREP_ODD register and VREP_EVEN
register. With the additional VREPA_3 register and VREPA_4
register, Group A can also support 3-line and 4-line alternation.
As discussed in the Generating HBLK Line Alternation section,
the HBLK signal can be alternated for odd and even lines. Figure
shows an example of V-pattern group repetition alternation
and HBLK Mode 0 alternation used together.
XV1
XV2
XV24
HD
HBLK
XVTOGE1
XVTOGE2
XVTOGO1
XVTOGO2
XVTOGE1
XVTOGE2
NOTES
1. THE NUMBER OF REPEATS FOR V-PATTERN GROUPS A/B/C/D CAN BE ALTERNATED ON ODD AND EVEN LINES.
2. GROUP A ALSO SUPPORTS 3- AND 4-LINE ALTERNATION USING THE ADDITIONAL VREPA_3 AND VREPA_4 REGISTERS.
3. THE HBLK TOGGLE POSITIONS CAN BE ALTERNATED BETWEEN ODD AND EVEN LINES TO GENERATE DIFFERENT HBLK PATTERNS.
VREPA_1 = 2
(OR VREPB/C/D_EVEN = 2)
VREPA_2 = 5
(OR VREPB/C/D_ODD = 5)
VREPA_1 = 2
(OR VREPB/C/D_EVEN = 2)
05
89
1-
04
2
Figure 42. Odd/Even Line Alternation of V-Pattern Group Repetitions and HBLK Toggle Positions
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