Datasheet

AD9949
Rev. B | Page 28 of 36
22033 11
VD
NOTES
1. VD FALLING EDGE WILL RESET THE PxGA GAIN REGISTER STEERING TO 0101 LINE.
2. HD FALLING EDGES WILL ALTERNATE THE PxGA GAIN REGISTER STEERING BETWEEN 0101 AND 2323 LINES.
3. FIELDVAL IS ALWAYS RESET TO 0 ON VD FALLING EDGES.
HD
110XX
PxGA GAIN
REGISTER
FIELDVAL
0
FIELDVAL = 0
022033 11110000
FIELDVAL = 0
03751-034
Figure 33. PxGA Color Steering—Progressive Mode
00 311 22
VD
NOTES
1. FIELDVAL = 0 (START OF FIRST FIELD) WILL RESET THE PxGA GAIN REGISTER STEERING TO 0101 LINE.
2. FIELDVAL = 1 (START OF SECOND FIELD) WILL RESET THE PxGA GAIN REGISTER STEERING TO 2323 LINE.
3. HD FALLING EDGES WILL RESET THE PxGA GAIN REGISTER STEERING TO EITHER 0 (FIELDVAL = 0) OR 2 (FIELDVAL = 1).
4. FIELDVAL WILL TOGGLE BETWEEN 0 AND 1 ON EACH VD FALLING EDGE.
HD
110XX
PxGA GAIN
REGISTER
FIELDVAL
0
FIELDVAL = 0
31100 0033221
FIELDVAL = 1 FIELDVAL = 0
1
03751-035
Figure 34. PxGA Color Steering—Interlaced Mode
22 333 22
VD
NOTES
1. FIELDVAL = 0 (START OF FIRST FIELD) WILL RESET THE PxGA GAIN REGISTER STEERING TO 0101 LINE.
2. FIELDVAL = 1 (START OF SECOND FIELD) WILL RESET THE PxGA GAIN REGISTER STEERING TO 2323 LINE.
3. FIELDVAL = 2 (START OF THIRD FIELD) WILL RESET THE PxGA GAIN REGISTER STEERING TO 0101 LINE.
4. HD FALLING EDGES WILL ALTERNATE THE PxGA GAIN REGISTER STEERING BETWEEN 0101 AND 2323 LINES.
5. FIELDVAL WILL INCREMENT AT EACH VD FALLING EDGE, REPEATING THE 0...1...2...0...1...2 PATTERN.
HD
110XX
PxGA GAIN
REGISTER
FIELDVAL
0
FIELDVAL = 0
31100 2200113
FIELDVAL = 1 FIELDVAL = 2
3
03751-036
Figure 35. PxGA Color Steering—Three-Field Mode