AD9995 datasheet(17/60 Pages) AD

17 / 60 page

AD9995

–17–

Table V.Vertical Pattern Group Registers

Length

Range

Description

VPOL

High/Low

Starting Polarity of Each V1–V6 Output

VTOG1

12b

0–4096 Pixel Location

First Toggle Position within Line for Each V1–V6 Output

VTOG2

12b

0–4096 Pixel Location

Second Toggle Position within Line for Each V1–V6 Output

VTOG3

12b

0–4096 Pixel Location

Third Toggle Position within Line for Each V1–V6 Output

VTOG4

12b

0–4096 Pixel Location

Fourth Toggle Position, only Available in V-Pattern Groups 8 and 9

VPATLEN

12b

0–4096 Pixels

Total Length of Each V-Pattern Group

FREEZE1

12b

0–4096 Pixel Location

Holds the V1–V6 Outputs at Their Current Levels (Static DC)

RESUME1

12b

0–4096 Pixel Location

Resumes Operation of the V1–V6 Outputs to Finish Their Pattern

FREEZE2

12b

0–4096 Pixel Location

Holds the V1–V6 Outputs at Their Current Levels (Static DC)

RESUME2

12b

0–4096 Pixel Location

Resumes Operation of the V1–V6 Outputs to Finish Their Pattern

PROGRAMMABLE SETTINGS FOR EACH V-PATTERN:

1. START POLARITY

2. FIRST TOGGLE POSITION

3. SECOND TOGGLE POSITION (3RD TOGGLE POSITION ALSO AVAILABLE, 4TH TOGGLE POSITION AVAILABLE FOR V-PATTERN GROUPS 8 AND 9)

4. TOTAL PATTERN LENGTH FOR ALL V1-V6 OUTPUTS

START POSITION OF V-PATTERN GROUP IS PROGRAMMABLE IN V-SEQUENCE REGISTERS

Figure 16. Vertical Pattern Group Programmability

Vertical Pattern Groups (VPAT)

The vertical pattern groups define the individual pulse patterns

for each V1–V6 output signal.Table V summarizes the registers

available for generating each of the 10 V-pattern groups.The start

polarity (VPOL) determines the starting polarity of the vertical

sequence, and can be programmed high or low for each V1–V6

output.The first, second, and third toggle position (VTOG1,

VTOG2, VTOG3) are the pixel locations within the line where

the pulse transitions. A fourth toggle position (VTOG4) is also

available for V-Pattern Groups 8 and 9. All toggle positions are

12-bit values, allowing their placement anywhere in the hori-

zontal line. A separate register,VPATSTART, specifies the start

position of the V-pattern group within the line (see the Vertical

Sequences section).The VPATLEN register designates the total

length of the V-pattern group, which will determine the number

of pixels between each of the pattern repetitions, when repetitions

are used (see the Vertical Sequences section).

The FREEZE and RESUME registers are used to temporarily

stop the operation of the V1–V6 outputs. At the pixel location

specified in the FREEZE register, the V1–V6 outputs will be

held static at their current dc state, high or low. The V1–V6

outputs are held until the pixel location specified by RESUME

vided, allowing the vertical outputs to be interrupted twice in

the same line. The FREEZE and RESUME positions are pro-

grammed in the V-pattern group registers, but are separately

enabled using the VMASK registers, which are described in the

Vertical Sequence section.

REV. 0

AD9995 Datasheet(PDF) 17 Page - Analog Devices

AD9995 Datasheet(HTML) 17 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 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 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL