ASX340CS datasheet(44/74 Pages) ONSEMI

44 / 74 page

ASX340CS_DS Rev. F Pub. 6/15 EN

©Semiconductor Components Industries, LLC, 2015.

ASX340CS: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor

Overlay Character Generator

The position of the target will be used to determine the calibration value that shifts the

X,Y position of adjustable overlay graphics.

The overlay calibration is intended to be applied on a device by device basis “in system,”

which means after the camera has been installed. ON Semiconductor provides basic

programming scripts that may reside in the SPI Flash memory to assist in this effort.

Overlay Character Generator

In addition to the four overlay layers, a fifth layer exists for a character generator overlay

string.

There are a total of:

• 16 alphanumeric characters available

• 22 characters maximum per line

• 16 x 32 pixels with 1-bit color depth

Any update to the character generator string requires the string to be passed in its

entirety with the Host Command. Character strings have their own control properties

aside from the Overlay bitmap properties.

Figure 26:

Internal Block Diagram Overlay

Overla y

Layer0

Layer1

Layer2

Layer3

BT 65 6

Nu m be r

Gen era to r

BT 65 6

Tim in g co ntrol

User R egiste rs

Da ta B u s

DM A /C P U

RO M

ASX340CS 数据表(PDF) 44 Page - ON Semiconductor

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