AD9923A Analog Devices, AD9923A Datasheet - Page 36

• Manufacturer Part Number: AD9923A
• Description: CCD Signal Processor
• Manufacturer: Analog Devices

AD9923A
Pixel 2 and Pixel 9 within a single HD line. However, in
multiplier mode the toggle positions are multiplied by
VLEN = 4; therefore, the first toggle occurs at pixel count = 8,
Table 18. Multiplier Mode Register Parameters
Register
MULTI
XVPOL
XVTOG
VLEN
VREP
XV1 TO XV13
NUMBER
PIXEL
Length
(Bits)
1
1
13
13
12
VLEN
HD
MULTIPLIER MODE V-PATTERN GROUP PROPERTIES:
1
2
3
4
5
START POLARITY (ABOVE: STARTPOL = 0).
FIRST AND SECOND TOGGLE POSITIONS (ABOVE: XVTOG1 = 2, XVTOG2 = 9).
LENGTH OF VPAT COUNTER (ABOVE: VPATLEN = 4); THIS IS THE MINIMUM RESOLUTION FOR TOGGLE POSITION CHANGES.
TOGGLE POSITIONS OCCUR AT LOCATION EQUAL TO (XVTOG × VPATLEN).
IF SWEEP REGION IS ENABLED, THE V-PULSES MAY ALSO CROSS THE HD BOUNDRIES, AS SHOWN ABOVE.
1
1
1
2
2
Range
High/low
High/low
0 to 8191 pixel location
0 to 8191 pixels
0 to 4095
3
START POSITION OF VPAT GROUP IS STILL PROGRAMMED IN THE V-SEQUENCE REGISTERS
3
3
4
4
1
5
2
6
3
7
Figure 49. Example of Multiplier Region for Wide Vertical Pulse Timing
4
8
4
2
1
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
2
3
4
1
2
Description
High enables multiplier mode
Starting polarity of XV1 to XV13 signals in each VPAT group
Toggle positions for XV1 to XV13 signals in each VPAT group
Used as multiplier factor for toggle position counter
VREPE/VREPO should be set to the value of the highest XVTOG value
3
Rev. 0 | Page 36 of 88
4
5
1
2
3
4
and the second toggle occurs at pixel count = 36. Sweep mode is
also enabled to allow the toggle positions to cross the HD line
boundaries.
The MULTI function only applies to signals assigned to Group A.
It cannot be used at the same time as the TWOGROUP function or
if any signals are assigned to Group B.
1
2
3
4
1
2
3
4
1
2
3
4
5
1
2
3
4
2
4
1
2
3
4