AR0130CSSC00SPBA0-DP1 datasheet(17/40 Pages) ONSEMI

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AR0130CS

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When using horizontal mirror mode, the user must

retrigger column correction. Please refer to the column

correction section to see the procedure for column

correction retriggering. Bayer resampling must be enabled,

by setting bit 4 of register 0 x 306E[4] = 1.

Figure 15. Six Pixels In Normal and Column Mirror Readout Modes

G0[11:0] R0[11:0] G1[11:0] R1[11:0] G2[11:0] R2[11:0]

G2[11:0] R2[11:0] G1[11:0] R1[11:0] G0[11:0] R0[11:0]

DOUT[11:0]

Normal readout

DOUT[11:0]

Reverse readout

Row Mirror Image

By setting R0x3040[15] = 1, the readout order of the rows

is reversed as shown in Figure 16. The starting Bayer color

pixel is maintained in this mode by a 1−pixel shift in the

imaging array. When using horizontal mirror mode, the user

must retrigger column correction. Please refer to the column

correction section to see the procedure for column

correction retriggering.

Figure 16. Six Rows In Normal and Row Mirror Readout Modes

Row0 [11:0] Row1 [11:0] Row2 [11:0] Row3 [11:0] Row4 [11:0] Row5 [11:0]

Row5 [11:0] Row4 [11:0] Row3 [11:0] Row2 [11:0] Row1 [11:0] Row0[11:0]

DOUT[11:0]

Normal readout

DOUT[11:0]

Reverse readout

Maintaining a Constant Frame Rate

Maintaining a constant frame rate while continuing to

have the ability to adjust certain parameters is the desired

scenario. This is not always possible, however, because

shutter pointer for a frame is usually active during the

readout of the previous frame. Therefore, any register

changes that could affect the row time or the set of rows

sampled causes the shutter pointer to start over at the

beginning of the next frame.

By default, the following register fields cause a “bubble”

in the output rate (that is, the vertical blank increases for one

frame) if they are written in video mode, even if the new

value would not change the resulting frame rate. The

following list shows only a few examples of such registers;

a full listing can be seen in the AR0130 Register Reference.

• x_addr_start

• x_addr_end

• y_addr_start

• y_addr_end

• frame_length_lines

• line_length_pclk

• coarse_integration_time

• fine_integration_time

• read_mode

The size of this bubble is (Integration_Time

× tROW),

calculating the row time according to the new settings.

The Coarse_Integration_Time and

Fine_Integration_Time fields may be written to without

causing a bubble in the output rate under certain

circumstances. Because the shutter sequence for the next

frame often is active during the output of the current frame,

this would not be possible without special provisions in the

hardware. Writes to these registers take effect two frames

after the frame they are written, which allows the integration

time to increase without interrupting the output or producing

a corrupt frame (as long as the change in integration time

does not affect the frame time).

Synchronizing Register Writes to Frame Boundaries

Changes to most register fields that affect the size or

brightness of an image take effect on the frame after the one

during which they are written. These fields are noted as

“synchronized to frame boundaries” in the AR0130 Register

Reference. To ensure that a register update takes effect on

the next frame, the write operation must be completed after

the leading edge of FV and before the trailing edge of FV.

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