TSL2563CS datasheet(26/38 Pages) TAOS

26 / 38 page

TSL2562, TSL2563

LOW-VOLTAGE

LIGHT-TO-DIGITAL CONVERTER

TAOS066J − MAY 2007

The LUMENOLOGY r Company

www.taosinc.com

break;

}

// scale if gain is NOT 16X

if (!iGain) chScale = chScale << 4;

// scale 1X to 16X

// scale the channel values

channel0 = (ch0 * chScale) >> CH_SCALE;

channel1 = (ch1 * chScale) >> CH_SCALE;

//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

// find the ratio of the channel values (Channel1/Channel0)

// protect against divide by zero

unsigned long ratio1 = 0;

if (channel0 != 0) ratio1 = (channel1 << (RATIO_SCALE+1)) / channel0;

// round the ratio value

unsigned long ratio = (ratio1 + 1) >> 1;

// is ratio <= eachBreak ?

unsigned int b, m;

switch (iType)

{

case 0: // T package

if ((ratio >= 0) && (ratio <= K1T))

{b=B1T; m=M1T;}

else if (ratio <= K2T)

{b=B2T; m=M2T;}

else if (ratio <= K3T)

{b=B3T; m=M3T;}

else if (ratio <= K4T)

{b=B4T; m=M4T;}

else if (ratio <= K5T)

{b=B5T; m=M5T;}

else if (ratio <= K6T)

{b=B6T; m=M6T;}

else if (ratio <= K7T)

{b=B7T; m=M7T;}

else if (ratio > K8T)

{b=B8T; m=M8T;}

break;

case 1:// CS package

if ((ratio >= 0) && (ratio <= K1C))

{b=B1C; m=M1C;}

else if (ratio <= K2C)

{b=B2C; m=M2C;}

else if (ratio <= K3C)

{b=B3C; m=M3C;}

else if (ratio <= K4C)

{b=B4C; m=M4C;}

else if (ratio <= K5C)

{b=B5C; m=M5C;}

else if (ratio <= K6C)

{b=B6C; m=M6C;}

else if (ratio <= K7C)

{b=B7C; m=M7C;}

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