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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PC87365 датащи(PDF) 172 Page - National Semiconductor (TI) |
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PC87365 датащи(HTML) 172 Page - National Semiconductor (TI) |
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172 / 215 page  10.0 Temperature Sensor (TMS) (Continued) 172 www.national.com 10.2.5 Temperature Data Format Temperature data is stored in the RDCHT, CHTH, CHTL and CHOTL registers as an 8-bit, 2’s complement word with a Least Significant Bit (LSB) equal to 1 ° C. Table 51. Temperature Formats Figure 36. Temperature-to-Digital Transfer Function (Non-linear scale for clarity) 10.2.6 Standby Mode Standby mode is enabled by setting the Standby Mode bit in the TMSCFG register to 1 (default). Standby mode disables the conversion process to reduce power supply current. During standby mode, all registers retain their values and can be accessed by software (as usual). 10.2.7 Diode Fault Detection At the beginning of each conversion, the TMS goes through a diode fault detection sequence. If the DxP input is shorted to VDD or floating, the temperature reading will be +127 ° C and the Open bit of the TCHCFST register is set, which activates the ALERT and OTS outputs on completion of a conversion. If DxP is shorted to GND or DxN, the temperature reading is O ° C and the Temperature Low Limit bit of the TCHCFST register is not set. Temperature ( °C) Digital Output Binary Hex +125 0111 1101 7Dh +25 0001 1001 19h +1 0000 0001 01h 0 0000 0000 00h -1 1111 1111 FFh -25 1110 0111 E7h 0001,1001 0000,0001 0111,1101 1111,1111 1110,0111 1100,1001 +125 °C Temperature +25 °C 0000,0000 +1 °C -25 °C -55 °C -1 °C 0 °C |
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