AR0330 datasheet(57/77 Pages) ONSEMI

57 / 77 page

AR0330_DS Rev. U Pub. 4/15 EN

©Semiconductor Components Industries, LLC,2015.

AR0330: 1/3-Inch CMOS Digital Image Sensor

Changing Sensor Modes

Figure 40 illustrates how the sensor active readout time can be minimized while

reducing the frame rate. 1308 VB rows were added to the output frame to reduce the

2304 x1296 frame rate from 60 fps to 30 fps without increasing the delay between the

readout of the first and last active row.

Figure 40:

Example of the Sensor Output of a 2304 x1296 Frame at 30 fps

The frame valid and line valid signals mentioned in this diagram represent internal signals within the sensor.

The SYNC codes represented in this diagram represent the HiSPi Streaming SP protocol.

Changing Sensor Modes

All register writes are delayed by 1x frame. A register that is written to during the readout

of frame n will not be updated to the new value until the readout of frame n+2. This

includes writes to the sensor gain and integration registers.

Real-Time Context Switching

In the AR0330, the user may switch between two full register sets A and B by writing to a

context switch change bit in R0x30B0[13]. When the context switch is configured to

context A the sensor will reference the “Context A Registers”. If the context switch is

changed from A to B during the readout of frame n, the sensor will then reference the

context B coarse_integration_time registers in frame n+1 and all other context B registers

at the beginning of reading frame n+2. The sensor will show the same behavior when

changing from context B to context A.

Serial SYNC Codes

(1320 Rows)

HB (192 Pixels )

Frame Valid

Line Valid

1/30s

Active Rows

Vertical Blanking

Time

End of Frame

Readout

Start of Vertical Blanking

Start of Frame

Start of Active Row

End of Line

End of Frame

Row Reset

Row Read

Row Reset

Row Read

2304 x 1296

Row Reset

Row Read

Row Reset

Row Read

End of Frame

Readout

(1320 Rows)

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