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TSEV0108L39 Datasheet(PDF) 7 Page - TE Connectivity Ltd |
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TSEV0108L39 Datasheet(HTML) 7 Page - TE Connectivity Ltd |
7 / 9 page TSEV0108L39 Thermopile Sensor Module SENSOR SOLUTIONS /// TSEV0108L39 09/2015 Page 7 SPI SIGNAL SEQUENCE Reading Temperature of Pixel 1 Nr. MOSI MISO Direction Description 1 0xA1 --- M S Sending Command (See Command Reference) Wait at least 150us to arrange temperature data 2 0XFF 0xXX M S Receiving High Byte (Send 0xFF while receiving) Wait at least 150us to arrange temperature data 3 0XFF 0xXX M S Receiving Low Byte (Send 0xFF while receiving) EXAMPLE FOR 5V SPI INTERFACE LINE The sensor cannot be connected directly to a SPI interface with 5V levels. Therefore the following circuitry is suggested. The Baud rate should be limited to 20kHz. AMBIENT AND OBJECT MEASUREMENT Please refer following table for SPI commands to read object temperature and ambient temperature. Both values are transmitted in tenth of degrees. All temperature read outs are to be interpreted as twos complement. Com Description Reply Bytes 0xA0 Sensor Temperature Sensor temperature in tenth of degrees Celsius 2 0xA1 Temperature Pixel 1 Temp. at pixel position 1 in tenth of degree Celsius 2 0xA2 Temperature Pixel 2 Temp. at pixel position 2 in tenth of degree Celsius 2 0xA3 Temperature Pixel 3 Temp. at pixel position 3 in tenth of degree Celsius 2 0xA4 Temperature Pixel 4 Temp. at pixel position 4 in tenth of degree Celsius 2 0xA5 Temperature Pixel 5 Temp. at pixel position 5 in tenth of degree Celsius 2 0xA6 Temperature Pixel 6 Temp. at pixel position 6 in tenth of degree Celsius 2 0xA7 Temperature Pixel 7 Temp. at pixel position 7 in tenth of degree Celsius 2 0xA8 Temperature Pixel 8 Temp. at pixel position 8 in tenth of degree Celsius 2 |
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