AD9925BBCZ datasheet(26/96 Pages) AD

26 / 96 page

AD9925

Rev. A | Page 26 of 96

ld area temporarily stops the pixel counter for the

uring the masking area.

nd Fig

eration is controlled in the

tical se

ce re

s (VSEQ

tion.

Hold Area Using FREEZE/RESUME Registers

The FREEZE/RESUME registers can also be used to create a

hold area, in which the XV outputs are temporarily held and

then later continued starting at the point where they were held

As shown in Figure 34 and Figure 35, this is different than the

VMASK, because the XV outputs continue from where they

stopped rather than continuing from where they would have

been. The ho

XV outputs, while the v-masking allows the counter to continue

XV7 and XV8 may or may not use the hold area, as shown in

Figure 34 a

ure 35. The hold op

Bank 3 ver

quen

gisters, described in the Vertical

Sequence

) sec

XV1

XV6

1. WHEN HOLD = 1 FOR ANY V-SEQUENCE, THE FREEZE AND RESUME REGISTERS ARE USED TO SPECIFY THE HOLD AREA BOUNDRIES.

2. WHEN XV78HOLDEN = 0, XV7 AND XV8 DO NOT USE THE HOLD AR

V6. H-COUNTER FOR XV1–XV6 WILL STOP DURING HOLD AREA.

NOTES

EA, ONLY XV1–X

HOLD AREA

FOR XV1–XV6

XV7

XV8

NO HOLD

AREA FOR

XV7–XV8

FREEZE

RESUME

Figure 34. Vertical Hold Area Using the FREEZE/RESUME Registers

XV1

XV6

NOTES

1. WHEN HOLD = 1 FOR ANY VERTICAL SEQUENCE, THE FREEZE AND RESUME REGISTERS ARE USED TO SPECIFY THE HOLD AREA BOUNDRIES.

2. WHEN XV78HOLDEN = 1, XV7 AND XV8 ALSO USE THE HOLD AREA. H-COUNTER FOR XV1 TO XV8 WILL STOP DURING HOLD AREA.

XV7

HOLD AREA

FOR XV1 TO XV8

XV8

FREEZE

RESUME

Figure 35. Apply Hold Area to XV7 and XV8

AD9925BBCZ Datasheet(PDF) 26 Page - Analog Devices

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