MT9M001C12STM-EVAL Micron Technology Inc, MT9M001C12STM-EVAL Datasheet - Page 27

Manufacturer Part Number

MT9M001C12STM-EVAL

Description

Manufacturer

Micron Technology Inc

Datasheet

1.MT9M001C12STM-EVAL.pdf (35 pages)

Lead Free Status / Rohs Status

Compliant

Still Image Capture with External Synchronization

Figure 15: General Timing for Snapshot Mode

LINE_VALID Signal

Figure 16: Different LINE_VALID Formats

PDF: 09005aef81c2856f/Source: 09005aef80a3e031

MT9M001_DS_2.fm - Rev. F 5/06 EN

Reset Row 1

Reset Row x

In continuous mode video image capture, the TRIGGER signal should be held LOW or

“0.” To capture a still image, the sensor must first be put into snapshot mode by

programming a “1” in register 0x1E, bit 8. In snapshot mode, the sensor waits for a

TRIGGER signal (FRAME_VALID, LINE_VALID signals are LOW, pixel clock signal

continues). When the TRIGGER signal is received (active HIGH), one frame is read out (a

TRIGGER signal can also be achieved by programming a restart—for example, program

a “1” to bit 0 of Reg0x0B). The reset, readout timing for that frame will be the same as for

a continuous frame with similar register settings; the only difference is that only one

frame is read out. General timing for the snapshot mode is shown in Figure 15.

By setting bit 9 and 10 of Reg0x20 the line valid signal can get three different output

formats. The formats are shown when reading out four rows and two vertical blanking

rows (Figure 16). In the last format, the LINE_VALID signal is the XOR between the

continuously LINE_VALID signal and the FRAME_VALID signal.

Reset Row

FRAME_VALID

Continuously

TRIGGER

Readout

STROBE

LINE_VALID

Default

XOR

MT9M001: 1/2-Inch Megapixel Digital Image Sensor

MAX strobe length (all rows integrating)

MIN strobe length (1 row time)

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

Registers