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ADE7169F16 数据表(PDF) 68 Page - Analog Devices |
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ADE7169F16 数据表(HTML) 68 Page - Analog Devices |
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68 / 140 page  ADE7169F16 Preliminary Technical Data Rev. PrD | Page 68 of 140 Table 49. VSW ADC value SFR (VSWADC, 0xEF) Bit Location Bit Mnemonic Default Value Description 7-0 VSWADC 0 The VSW ADC value in this register is updated when an ADC interrupt occurs. Table 50. Battery ADC value SFR (BATADC, 0xDF) Bit Location Bit Mnemonic Default Value Description 7-0 BATADC 0 The battery ADC value in this register is updated when an ADC interrupt occurs. Table 51. Temperature ADC value SFR (TEMPADC, 0xD7) Bit Location Bit Mnemonic Default Value Description 7-0 TEMPADC 0 The temperature ADC value in this register is updated when an ADC interrupt occurs. TEMPERATURE MEASUREMENT To provide a digital temperature measurement, the ADE7169F16 includes a dedicated ADC. An 8-bit Temperature ADC value SFR (TEMPADC, 0xD7) holds the results of the temperature conversion. The resolution of the temperature measurement is TBD˚C/LSB. There are two ways to initiate a temperature conversion: - Single Temperature Measurement - Background Temperature Measurements Single Temperature Measurement Set the TEMP_ADC_GO bit in the Start ADC Measurement SFR (ADCGO, 0xD8) to get a temperature measurement. An interrupt will be generated when the conversion is done and the temperature measurement is available in the Temperature ADC value SFR (TEMPADC, 0xD7). Background Temperature Measurements Background temperature measurements are disabled by default. To configure the background temperature measurement mode, set a temperature measurement interval in the Peripheral ADC Strobe Period SFR (STRBPER, 0xF9). Then temperature measurements will be performed periodically in the background – see Table 45. When a temperature conversion completes, the new temperature ADC value is compared to the last temperature ADC value that created an interrupt. If the absolute difference between the two values is greater than the setting in the TEMP_DIFF bits in the Temperature and Supply Delta SFR (DIFFPROG, 0xF3), a TEMPADC interrupt is generated. This allows temperature measurements to take place completely in the background, only requiring MCU activity if the temperature has changed more than a configurable delta. To set up background temperature measurements: 1. Initiate a single temperature measurement by setting the TEMP_ADC_GO bit in the Start ADC Measurement SFR (ADCGO, 0xD8). 2. Upon completion of this measurement, configure the TEMP_DIFF[2:0] bits to establish the change in temperature that will trigger an interrupt. 3. Set up the interval for background temperature measurements by configuring the TEMP_PERIOD[1:0] bits. Temperature ADC in PSM1 and PSM2 Depending on the operating mode of the ADE7169F16, a temperature conversion is initiated only by certain actions: PSM0: In this operating mode, the 8052 is active. Temperature measurements are available in the background measurement mode and by initiating a single measurement. PSM1: In this operating mode, the 8052 is active and the part is powered from battery. Single temperature measurements can be initiated by setting the TEMP_ADC_GO bit in the Start ADC Measurement SFR (ADCGO, 0xD8). Background temperature measurements are not available. PSM2: In this operating mode, the 8052 is not active. Temperature conversions are available through the background measurement mode only. The Temperature ADC value SFR (TEMPADC, 0xD7) is updated with a new value only when a temperature ADC interrupt occurs. |
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