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APDS-9303 Datasheet(PDF) 11 Page - AVAGO TECHNOLOGIES LIMITED |
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APDS-9303 Datasheet(HTML) 11 Page - AVAGO TECHNOLOGIES LIMITED |
11 / 21 page 11 Interrupt Threshold Register (2h - 5h) The interrupt threshold registers store the values to be used as the high and low trigger points for the comparison function for interrupt generation. If the value generated by channel 0 crosses below or is equal to the low threshold specified, an interrupt is asserted on the interrupt pin. If the value generated by channel 0 crosses above the high threshold specified, an interrupt is asserted on the interrupt pin. Registers THRESHLOWLOW and THRESHLOWHIGH provide the low byte and high byte, respectively, of the lower interrupt threshold. Registers THRESHHIGHLOW and THRESHHIGHHIGH provide the low and high bytes, respectively, of the upper interrupt threshold. The high and low bytes from each set of registers are combined to form a 16–bit threshold value. The interrupt threshold registers default to 00h on power up. Table 7. Interrupt Threshold Register REGISTER ADDRESS BITS DESCRIPTION THRESHLOWLOW 2h 7:0 ADC channel 0 lower byte of the low threshold THRESHLOWHIGH 3h 7:0 ADC channel 0 upper byte of the low threshold THRESHHIGHLOW 4h 7:0 ADC channel 0 lower byte of the high threshold THRESHHIGHHIGH 5h 7:0 ADC channel 0 upper byte of the high threshold NOTE: Since two 8–bit values are combined for a single 16–bit value for each of the high and low interrupt thresholds, the Send Byte protocol should not be used to write to these registers. Any values transferred by the Send Byte protocol with the MSB set would be interpreted as the COMMAND field and stored as an address for subsequent read/write operations and not as the interrupt threshold information as desired. The Write Word protocol should be used to write byte–paired registers. For example, the THRESHLOWLOW and THRESHLOWHIGH registers (as well as the THRESHHIGHLOW and THRESHHIGHHIGH registers) can be written together to set the 16–bit ADC value in a single transaction. |
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