MT9V024 datasheet(31/62 Pages) ONSEMI

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MT9V024_DSRev. G Pub. 4/15 EN

©Semiconductor Components Industries, LLC, 2015.

MT9V024: 1/3-Inch Wide-VGA Digital Image Sensor

Feature Description

Exposure Indicator

The exposure indicator is controlled by:

•R0x1B LED_OUT Control

The MT9V024 provides an output pin, LED_OUT, to indicate when the exposure takes

place. When R0x1B bit 0 is clear, LED_OUT is HIGH during exposure. By using R0x1B, bit

1, the polarity of the LED_OUT pin can be inverted.

High Dynamic Range

High dynamic range is controlled by:

In the MT9V024, high dynamic range (by setting R0x0F, bit 0 or 8 to 1) is achieved by

controlling the saturation level of the pixel (HDR or high dynamic range gate) during the

exposure period. The sequence of the control voltages at the HDR gate is shown in

Figure 23. After the pixels are reset, the step voltage, V_Step, which is applied to HDR

gate, is set up at V1 for integration time t1, then to V2 for time t2, then V3 for time t3, and

finally it is parked at V4, which also serves as an antiblooming voltage for the photode-

tector. This sequence of voltages leads to a piecewise linear pixel response, illustrated

(approximately) in Figure 23 and in Figure 24 on page 27.

Figure 23:

Sequence of Control Voltages at the HDR Gate

Context A

Context B

High Dynamic Enable

R0x0F[0]

R0x0F[8]

Shutter Width 1

R0x08

R0xCF

Shutter Width 2

R0x09

R0xD0

Shutter Width Control

R0x0A

R0xD1

V_Step Voltages

R0x31-R0x34

R0x39-R0x3C

V4~0.8V

Exposure

HDR

Voltage

VAA (3.3V)

V1~1.4V

V2~1.2V

V3~1.0V

MT9V024 Datasheet(PDF) 31 Page - ON Semiconductor

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