Datasheet

AD9923A
Rev. A | Page 35 of 84
Table 19. Multiplier Mode Register Parameters
Register
Length
(Bits)
Range Description
MULTI 1 High/low High enables multiplier mode
XVPOL 1 High/low Starting polarity of XV1 to XV13 signals in each VPAT group
XVTOG 13 0 to 8191 pixel location Toggle positions for XV1 to XV13 signals in each VPAT group
VLEN 13 0 to 8191 pixels Used as multiplier factor for toggle position counter
VREP 12 0 to 4095 VREPE/VREPO should be set to the value of the highest XVTOG value
XV1 TO XV13
HD
VLEN
MULTIPLIER MODE V-PATTERN GROUP PROPERTIES:
1
START POLARITY (ABOVE: STARTPOL = 0).
2
FIRST AND SECOND TOGGLE POSITIONS (ABOVE: XVTOG1 = 2, XVTOG2 = 9).
3
LENGTH OF VPAT COUNTER (ABOVE: VPATLEN = 4); THIS IS THE MINIMUM RESOLUTION FOR TOGGLE POSITION CHANGES.
4
TOGGLE POSITIONS OCCUR AT LOCATION EQUAL TO (XVTOG × VPATLEN).
5
IF SWEEP REGION IS ENABLED, THE V-PULSES MAY ALSO CROSS THE HD BOUNDRIES, AS SHOWN ABOVE.
1234123412341234123412341234123412341234
START POSITION OF VPAT GROUP IS STILL PROGRAMMED IN THE V-SEQUENCE REGISTERS
PIXEL
NUMBER
12345678910111213141516171819202122232425262728293031323334353637383940
3
55
4
1
2
4
2
0
5586-048
Figure 49. Example of Multiplier Region for Wide Vertical Pulse Timing