AR0130CSSC00SPBA0-DP1 datasheet(11/40 Pages) ONSEMI

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AR0130CS

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LV and FV

The timing of the FV and LV outputs is closely related to

the row time and the frame time.

FV will be asserted for an integral number of row times,

which will normally be equal to the height of the output

image.

LV will be asserted during the valid pixels of each row.

The leading edge of LV will be offset from the leading edge

of FV by 6 PIXCLKs. Normally, LV will only be asserted if

FV is asserted; this is configurable as described below.

LV Format Options

The default situation is for LV to be de−asserted when FV

is de−asserted. By configuring R0x306E[1:0], the LV signal

can take two different output formats. The formats for

reading out four lines and two vertical blanking lines are

shown in Figure 10.

Figure 10. LV Format Options

Default

Continuous LV

The timing of an entire frame is shown in Figure 11: “Line

Timing and FRAME_VALID/LINE_VALID Signals”.

Frame Time

The pixel clock (PIXCLK) represents the time needed to

sample 1 pixel from the array. The sensor outputs data at the

maximum rate of 1 pixel per PIXCLK. One row time (tROW)

is the period from the first pixel output in a row to the first

pixel output in the next row. The row time and frame time are

defined by equations in Table 4.

Figure 11. Line Timing and FRAME_VALID/LINE_VALID Signals

Table 4. FRAME TIME (Example Based on 1280 x 960, 45 Frames Per Second)

Parameter

Name

Equation

Timing at 74.25 MHz

Active data time

Context A: R0x3008 − R0x3004 + 1

Context B: R0x308E − R0x308A + 1

1280 pixel clocks

= 17.23 ms

Frame start blanking

6 (fixed)

6 pixel clocks

= 0.08 ms

Frame end blanking

6 (fixed)

6 pixel clocks

= 0.08 ms

Horizontal blanking

R0x300C − A

370 pixel clocks

= 4.98 ms

A+Q (tROW)

Line (Row) time

R0x300C

1650 pixel clocks

= 22.22 ms

Vertical blanking

Context A: (R0x300A−(R0x3006−R0x3002+1)) x (A + Q)

Context B: ((R0x30AA−(R0x3090−R0x308C+1)) x (A + Q)

49,500 pixel clocks

= 666.66 ms

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