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MLX90308CCC Datasheet(PDF) 13 Page - Micro Electronics |
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MLX90308CCC Datasheet(HTML) 13 Page - Micro Electronics |
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13 / 26 page  MLX902xx Name of Sensor Rev Y.X 22/Aug/98 Page 13 MLX90308CCC Programmable Sensor Interface MLX90308CCC Programmable Sensor Interface Page 13 Rev 2.2 23/Oct/01 Figure 5. Alarm Function OUTPUT Input Signal MLX90308 Low Output Low Trigger High Trigger High Output Selected input MUX Value TPO 0010 IAO 0110 GNO 0000 VMO 0011 IO1 0100 IO2 0101 Table 7. Alarm Source Bit Definition Figure 6. Alarm & Steering Source Points VMO CMO CMN TSTB VM Gain CM Offset Power Supply Regulation Temp Sense & Amp Bidirectional I/O ADC & DAC UART Microcontroller Core, Memory, EEPROM Reset,Test,& Oscillator OFC FLT VDD1 FET VDD GND COMS IO2 IO1 TMP VBN VBP IAO GNO TPO Alarm Option This option allows controlling the low and high limits of the output (See Figure 5.). The output level is set when the output tries to exceed the programmed limits. Five bytes are reserved for this option. The first byte is the low trigger limit and the second the low output. The third and fourth bytes are used for the high limit and the output. The fifth byte is the alarm control, used to select the alarm input. The different levels are programmed as eight bit numbers. These correspond to the 8 upper bits of the 10 bit signal measurement. When the alarm mode is not used, all of the data is 0. The control code is coded as shown in Table 7. The six possible signals are listed below and are encoded on the 4 MSB’s of byte 31 of the EEPROM. IO1 & IO2 IO1 and IO2 are used in the alarm and level steering modes. For custom firmware, they can be used for a digital input, an analog input, or a digital Figure 7. Level Steering Function IO1, IO2 MLX90308 Level 1 1 -1 1 - 0 0 - 1 0 - 0 (I02,I01) Level 2 Level 3 |
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