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| 型號(hào)： | AD9995KCPRL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | 12-Bit CCD Signal Processor with Precision Timing ⑩ 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)： | 19/60頁 |
| 文件大小： | 1593K |
| 代理商： | AD9995KCPRL |
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AD9995
–19–
Complete Field: Combining V-Sequences
After the V-sequences have been created, they are combined to
create different readout fields. A field consists of up to seven
different regions, and within each region a different V-sequence
can be selected. Figure 18 shows how the sequence change posi-
tions (SCP) designate the line boundary for each region, and
the VSEQSEL registers then select which V-sequence is used
during each region. Registers to control the VSG outputs are also
included in the Field registers.
Table VII summarizes the registers used to create the different
fields. Up to six different fields can be preprogrammed using all
of the Field registers.
The VEQSEL registers, one for each region, select which of the
10 V-sequences will be active during each region. The SWEEP
registers are used to enable SWEEP mode during any region.
The MULTI registers are used to enable Multiplier mode dur-
ing any region. The SCP registers create the line boundaries for
each region. The VDLEN register specifies the total number of
lines in the field. The total number of pixels per line (HDLEN) is
specified in the V-sequence registers, but the HDLAST register
specifies the number of pixels in the last line of the field. The
VPATSECOND register is used to add a second V-pattern group
to the V1–6 outputs during the sensor gate (VSG) line.
The SGMASK register is used to enable or disable each indi-
vidual VSG output. There is a single bit for each VSG output;
setting the bit high will mask the output, setting it low will enable
the output. The SGPAT register assigns one of the four different
SG patterns to each VSG output. The individual SG patterns are
created separately using the SG pattern registers. The SGLINE1
register specifies which line in the field will contain the VSG out-
puts. The optional SGLINE2 register allows the same VSG pulses
to be repeated on a different line.
Table VII. Field Registers
Description
Selected V-Sequence for Each Region in the Field.
Enables Sweep Mode for Each Region, When Set High.
Enables Multiplier Mode for Each Region, When Set High.
Sequence Change Position for Each Region.
0–4095 # of Lines
Total Number of Lines in Each Field.
0–4095 # of Pixels
Length in Pixels of the Last HD Line in Each Field.
0–9 V-Pattern Group #
Selected V-Pattern Group for Second Pattern Applied During VSG Line.
High/Low, Each VSG
Set High to Mask Each Individual VSG Output. VSG1 [0], VSG2 [1],
VSG3 [2], VSG4 [3], VSG5 [4].
0–3 Pattern #, Each VSG
Selects the VSG Pattern Number for Each VSG Output. VSG1 [1:0],
VSG2 [3:2], VSG3 [5:4], VSG4 [7:6], VSG5 [9:8].
0–4095 Line #
Selects the Line in the Field where the VSG Are Active.
0–4095 Line #
Selects a Second Line in the Field to Repeat the VSG Signals.
Register
VSEQSEL
SWEEP
MULTI
SCP
VDLEN
HDLAST
VPATSECOND
SGMASK
Length
4b
1b
1b
12b
12b
12b
4b
6b
Range
0–9 V-Sequence #
High/Low
High/Low
0–4095 Line #
SGPATSEL
12b
SGLINE1
SGLINE2
12b
12b
VD
REGION 0
FIELD SETTINGS:
1. SEQUENCE CHANGE POSITIONS (SCP1–6) DEFINE EACH OF THE 7 REGIONS IN THE FIELD.
2. VSEQSEL0–6 SELECTS THE DESIRED V-SEQUENCE (0–9) FOR EACH REGION.
3. SGLINE1 REGISTER SELECTS WHICH HD LINE IN THE FIELD WILL CONTAIN THE SENSOR GATE PULSE(S).
V1–V6
HD
SCP 1
SCP 2
VSEQSEL0
VSEQSEL1
SCP 3
VSEQSEL2
SCP 4
VSEQSEL3
SCP 5
VSEQSEL4
SCP 6
VSEQSEL5
VSEQSEL6
REGION 1
REGION 2
REGION 3
REGION 4
REGION 5
REGION 6
VSG
SGLINE1
Figure 18. Complete Field Is Divided into Regions
REV. 0
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