MT9V024 datasheet(13/40 Pages) ONSEMI

13 / 40 page

MT9V024/D

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Recommended Register Settings

Table 8 describes new suggested register settings, and

descriptions of performance improvements and conditions:

Table 8.

RECOMMENDED REGISTER SETTINGS AND PERFORMANCE IMPACT

(RESERVED REGISTERS)

Current Default

New Setting

Performance Impact

R0x20

0x01C1

0x03C7

Recommended by design to improve performance in HDR

mode and when frame rate is low. We also recommended

using R0x13 = 0x2D2E with this setting for better column

FPN. NOTE: When coarse integration time set to 0 and fine

integration time less than 456, R0x20 should be set to

0x01C7

R0x24

0x0010

0x001B

Corrects pixel negative dark offset when global reset in

R0x20[9] is enabled.

R0x2B

0x0004

0x0003

Improves column FPN.

R0x2F

0x0004

0x0003

Improves FPN at near−saturation.

FEATURE DESCRIPTION

Operational Modes

The MT9V024 works in master, snapshot, or slave mode.

In master mode the sensor generates the readout timing. In

snapshot mode it accepts an external trigger to start

integration, then generates the readout timing. In slave mode

the sensor accepts both external integration and readout

controls. The integration time is programmed through the

two−wire serial interface during master or snapshot modes,

or controlled through an externally generated control signal

during slave mode.

Master Mode

There are two possible operation methods for master

mode: simultaneous and sequential. One of these operation

modes must be selected through the two−wire serial

inter−face. Additional details on this mode can be found in

AND9255/D Master Exposure Mode Operation.

Simultaneous Master Mode

In simultaneous master mode, the exposure period occurs

during readout. The frame synchronization waveforms are

shown in Figure 14 and Figure 15. The exposure and readout

happen in parallel rather than sequential, making this the

fastest mode of operation.

EXPOSURE TIME

FRAME TIME

tVBLANK

tLED2FV−SIM

LED_OUT

FRAME_VALID

LINE_VALID

Figure 14. Simultaneous Master Mode Synchronization Waveforms #1

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