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

6

©2004 Micron Technology. Inc.

Table 3:

Determination of Frame Timing

NOTE:

N = number of rows in image

RT = row time

VB = vertical blanking rows (255 rows maximum); set in register 6

HB = horizontal blanking in SYSCLK cycles (255 maximum); set forth in register 6

Simultaneous Master Mode

There are two possible operation methods for mas-

ter mode: simultaneous master mode and sequential

master mode. One of these operation modes must be

selected via the two-wire serial interface. In simulta-

neous master mode the exposure period occurs during

readout. The frame synchronization waveforms are

shown in Figure 6 and Figure 7. This is the fastest

mode of operation since the exposure and readout are

happening in parallel rather than sequentially. Please

note that with this speed optimized timing the first row

readout is the last row of the previous frame that is still

in the row memory.

Figure 6: Simultaneous Master Mode Frame Synchronization Waveforms

readout time > exposure time

NOTE:

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

Figure 7: Simultaneous Master Mode Frame Synchronization Waveforms

exposure time > readout time

NOTE:

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

EXPOSURE TIME > READOUT TIME

READOUT TIME > EXPOSURE TIME

No Blanking

Frame Time = Exposure Time

Frame Time = N x RT

With Vertical Blanking

Frame Time = Exposure Time + VB

Frame Time = (N + VB) x RT

Vertical Blanking

EXPOSE

(output)

FRAME_VALID

(output)

ROW_VALID

(output)

DATA [9:0]

(output)

Exposure Time

XXX

XXX

Row

2

Row

1

Row

N

Row

N-1

Row

479

Row

478

Row

481

Row

1

Row

2

XXX

XXX

XXX

Row

480

Row

N

Row

N-1

Row

479

Row

478

XXX

Row

480

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

Vertical Blanking

EXPOSE

(output)

FRAME_VALID

(output)

ROW_VALID

(output)

DATA [9:0]

(output)

Exposure Time

XXX

XXX

Row

2

Row

1

Row

479

Row

478

Row

1

Row

2

Row

480

Row

479

Row

478

Row

480

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

Row

481