FS401LF datasheet(82/104 Pages) ETC2

82 / 104 page

FS401, FS403

PRODUCT SPECIFICATION

REV. NO. 1.7

JANUARY 24, 2007

Input Vertical Offset, IVO is a twelve bit value that sets the vertical displacement of the captured active

video relative to the vertical sync as show in Figure 12.

Figure 12. Input Offset and Size Definitions

Input Horizontal Active Width, IHAW is the 10-bit terminal count of the number of horizontal pixels to be

inserted into frame store memory. (see Figure 12)

Input Vertical Active Height, IVAH is the 11-bit terminal count of the number of vertical pixels to be

inserted into frame store memory, which is equal to 2*ILS. (see Figure 12)

5.2.4 Output Offset and Size Control

Synchronization and timing of outgoing video pixel data is predetermined by the selection of the video

format. However, the location of the active video area must be selected by programming the offset

registers. Leading edges of outgoing horizontal and vertical sync define the dimensions of the outgoing

frame as shown in Figure 13. Offsets OVO and OHO define the position of the active video area within

the outgoing frame.

Output Horizontal Offset, OHO is the 11-bit terminal count of the horizontal displacement of the outgoing

active video in pixels relative to the leading edge of horizontal sync. (see Figure 13)

Output Vertical Offset, OVO is the 10-bit terminal count of the vertical displacement of the outgoing active

video in pixels relative to the beginning of vertical sync equalization pulses. (see Figure 13)

Figure 13. Output Horizontal and Vertical Offset Definitions

5.2.5 Freeze Frame

Setting the FREEZE bit of the Command Register can interrupt writing to the Frame Store. Capture will

continue until the end of the current frame.

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