VG6640 datasheet(68/126 Pages) STMICROELECTRONICS

68 / 126 page

Video data interface

VG6640, VD6640

68/126

DocID023597 Rev 11

Visible pixel lines

The visible pixels contain valid image data. The image sensor only supports the RAW12

data format which is a 12-bit depth raw Bayer format.

ASIL data lines

There are always 4 ASIL data lines immediately following the visible pixel lines.

Embedded data lines

The embedded data lines provide a mechanism to embed non-image data such as sensor

configuration details and image statistics values within a frame of CSI-2 data.

There are always 2 leading data lines and 6 trailing data lines transmitted with each image

frame.

Inter-line blanking

During inter-line blanking the CSI-2 interface remains in the low power (LP) state. (There is

no concept of line blanking being transmitted, the interface simply spends longer in the LP

state between active line data.)

Inter-frame padding/frame blanking

During inter-frame blanking the CSI-2 interface remains in the low power (LP) state. (There

is no concept of frame blanking being transmitted, the interface simply spends longer in the

LP state between active frame data.)

5.2

Parallel ITU data link

Image data may be transferred to the companion device through a 12-bit parallel ITU

interface. The parallel ITU interface is capable of transmitting at up to 792 Mbit/s (66 MHz).

Full resolution images (in 22:12-bit compressed format) may be transferred at up to 45 fps

and 720p resolution images at up to 60 fps.

5.2.1

Features

Physical layer

The physical layer (D-PHY) of the parallel interface is via open-ended signal lines and

therefore care should be taken to minimize their length, EMI and crosstalk. Data is

transmitted over 12 signal lines and clocked by a pixel clock (PIX-CLK). The parallel

interface will remain in a high impedance state if deselected.

Embedded data lines

The embedded data lines provide a mechanism to embed non-image data such as sensor

configuration details and image statistics values within a frame of ITU data.

There are always 2 leading data lines and 10 trailing data lines transmitted with each image

frame.

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