Datasheet

AD9920A
Rev. B | Page 39 of 112
XV1
XV2
XV23
VLENA VLENB VLENC VLEND
V
-P
A
TTERN
A
XV3
V
-P
A
TTERN B
V
-P
A
TTERN
C
V
-P
A
TTERN D
NOTES
1. EACH SEGMENT MUST BE THE SAME LENGTH.
VLENA = VLENB = VLENC = VLEND.
06878-046
Figure 47. Vertical Timing Divided into Four Segments: VPATA, VPATB, VPATC, and VPATD
HD
COMBINED
V-PATTERN
NOTES
1. ABLE TO CONCATENATE PATTERNS TOGETHER ARBITRARILY.
2. EACH PATTERN CAN HAVE UP TO FOUR TOGGLES PROGRAMMED.
3. CAN CONCATENATE UP TO 18 PATTERNS INTO A MERGED PATTERN.
4. ODD AND EVEN LINES CAN HAVE A DIFFERENT PATTERN CONCATENATION
SPECIFIED BY VALTSEL EVEN AND ODD REGISTERS.
ABBDACCA
BCBDABAA
06878-047
Figure 48. Concatenating Each VPAT Group in an Arbitrary Order
NOTES
1. SIX V-PATTERN SEGMENTS CONCATENATED INTO A MERGED PATTERN.
2. COMMON AND REPETITIVE VTP SEGMENTS DERIVED FROM THE COMPLETE VTP PATTERN.
3. VALTSEL REGISTERS SPECIFY SEGMENT ORDER TO CREATE THE CONCATENATED MERGED PATTERN.
ACBD
XV1
XV2
XV23
XV3
VPATA VPATC VPATB VPATD VPATD VPATA
VALTSEL0_EVEN 0 0 1 1 1 0
VALTSEL1_EVEN 0 1 0 1 1 0
SEGMENT 1
AD
X
V1 TO XV23
SEGMENT 2 SEGMENT 3 SEGMENT4 SEGMENT 5 SEGMENT 6
HD
06878-048
Figure 49. Example of Special V-Sequence Alternation Mode Using VALTSEL Registers to Specify Segment Order