1/2-INCH VGA (WITH FREEZE-FRAME) CMOS

ACTIVE-PIXEL DIGITAL IMAGE SENSOR

09005aef80c07280

Micron Technology, Inc., reserves the right to change products or specifications without notice.

MT9V403_DS.fm - Rev. B 1/04 EN

7

©2004 Micron Technology. Inc.

Sequential Master Mode

In sequential master mode the exposure period is

followed by readout. The frame synchronization wave-

forms for sequential master mode are shown in

Figure 8.

Figure 8: Sequential Master Mode Frame Synchronization Waveforms

NOTE:

Vertical blanking is nominally 1 SYSCLK and 0 row times, and may be increased by using register 6.

Snapshot Mode

In snapshot mode the sensor accepts an input trig-

ger signal that initiates exposure, which is immediately

followed by readout. The interface signals utilized in

snapshot mode are depicted in Figure 9. In snapshot

mode the start of the integration period is determined

by the externally applied EXPOSE pulse that the user

inputs to the MT9V403. The integration time is prepro-

grammed via the two-wire interface. After each frame's

integration period is complete, the readout process

commences and the FRAME_VALID, ROW_ VALID, and

DATA signals are output.

Snapshot mode can be used to capture a single

image or a sequence of images. The frame rate is con-

trolled only by changing the period of the user sup-

plied EXPOSE pulse train. The frame synchronization

waveforms for snapshot mode are shown in Figure 9.

Insertion of horizontal blanking periods (specified via

the two-wire serial interface register) during readout is

allowed, but the user controls the vertical blanking by

controlling the input EXPOSE pulse.

Figure 9: Snapshot Mode Interface

Signals

Figure 10: Snapshot Mode Frame Synchronization Waveforms

Vertical Blanking

EXPOSE

(output)

FRAME_VALID

(output)

ROW_VALID

(output)

DATA [9:0]

(output)

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Row

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Row

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EXPOSE

MT9V4O3

SYSCLK

FRAME_VALID

ROW_VALID

DATA

LRST_N

CONTROLLER

EXPOSE

(input)

FRAME_VALID

(output)

ROW_VALID

(output)

DATA [9:0]

(output)

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Row

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Exposure Time

Row_Valid goes HIGH after (2.5 + (column start -1)) clocks + 1 row time

*

*

XXX