HB7121B

Electronics Industries Co., Ltd.

CMOS IMAGE SENSOR

System IC Division

With 8-bit ADC

This document is a general product description and is subject to change without notice. Hyundai Electronics does not assume

any responsibility for use of circuits described. NO patent licenses are implied.

DA21991011R_1.0

- 20 -

1999 Hyundai System IC Division

PRELIMINARY

FRAME TIMING DIAGRAMS

There are two frame timing cases,

l

Integration Time < EffectiveWindowHeight * Scale

l

Integration Time > EffectiveWindowHeight * Scale

EffectiveWindowHeight is equal to the number of data lines generated in a frame and is defined to be

selected by

if((RowStartAddress + WindowHeight + 1) <= (SensorArrayHeight)

EffectiveWindowHeight = WindowHeight;

else

EffectiveWidnowHeight = (SensorArrayHeight - RowStartAddress - 1);

For example, RowStartAddress = 200 and WindowHeight = 300, EffectiveWindowHeight is 113 and 113

data lines per a frame are generated.

Note : The above selection logic is somewhat confusing in respect of general counting measure. It’ s partly

due to the mixed use of indexing start points, i.e. ‘ 0’ and ‘ 1’ in the design. Therefore in order to avoid the

confusion it is desirable to just follows the equation when you estimate the frame rate.

Scale is selected according to Integration Time Mode by

If(PixelMode)

Scale = SensorArrayWidth; // For400*300 resolution chip, SensorArrayWidth is 414

else

Scale = 1;

SensorArrayHeight

[314]

SensorArrayWidth

[414]

RowStartAddress

[200]

WindowHeight

[300]

EffectiveWindowHeight

[113]

(0,0)