AS0260CSSC28SUD20 datasheet(44/83 Pages) ONSEMI

44 / 83 page

AS0260 DS Rev. G Pub. 5/15 EN

©Semiconductor Components Industries, LLC, 2015.

AS0260: 1/6-Inch 1080P High-Definition (HD) System-On-A-Chip (SOC) Digi-

tal Image Sensor

Figure 29:

JPEG Spoof Mode Timing with Continuous Clock

JPEG Spoof Stream in MIPI Output Mode

In MIPI output mode, only the JPEG spoof stream can be output. Similar to the parallel

output interface, the amount of expected pixel data is defined by the spoof width and

spoof height registers. If the valid JPEG data is less than expected size defined, dummy

data will be padded.

JPEG Status Segment

To provide the user quick knowledge of the status when the JPEG is enabled, a JPEG

status segment can be appended at the end of frame. The status segment can be

enclosed by SOSI/EOSI codes, as shown in Figure 30.

Figure 30:

JPEG Status Segment Structure

The contents of the status segment are summarized as follows:

• SOSI, start of status information, which is coded as 0xFFBC

•Original image size:

– Reserved (4 bytes, 0x00)

– The width of uncompressed full image (2 bytes)

– The height of uncompressed full image (2 bytes)

• Byte count in compressed JPEG frame (4 bytes)

• Status (2 bytes)

• EOSI, end of status information, which is coded as 0xFFBD

There are configurable options that can be set to match legacy parts.

Scalado SpeedTags™ Support

The AS0260 supports Scalado SpeedTags™ by inserting markers into the JPEG stream.

This is enabled by the register bit TX_SS.jpeg_ctrl.jpeg_insert_rajpeg_markers.

Status Segment

Dummy Data

PIXCLK

DOUT[7:0]

SOSI

0xFFBC

(optional)

EOSI

0xFFBD

(optional)

Original

Image Size 8 bytes

(optional)

TXF

Status

(2 bytes)

Frame

Length

(4 bytes)

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