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ADE7566 数据表(PDF) 65 Page - Analog Devices |
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ADE7566 数据表(HTML) 65 Page - Analog Devices |
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65 / 136 page  Preliminary Technical Data ADE7566/ADE7569 Rev. PrA | Page 65 of 136 TEMPERATURE, BATTERY, AND SUPPLY VOLTAGE MEASUREMENTS The ADE7566/ADE7569 include temperature measurements as well as battery and supply voltage measurements. These measure- ments enable many forms of compensation. The temperature and supply voltage measurements can be used to compensate external circuitry. The RTC can be calibrated over temperature to ensure that it does not drift. Supply voltage measurements allow the LCD contrast to be maintained despite variations in voltage. Battery measurements allow low battery detection to be performed. All ADC measurements are configured through the SFRs detailed in Table 44. The temperature, battery, and supply voltage measurements can be configured to continue functioning in PSM1 and PSM2. This is done by setting Bit RTCEN in the RTC Configuration SFR (TIMECON, 0xA1). Keeping the temperature measurement active ensures that it is not necessary to wait for the temperature measurement to settle before using it for compensation. Table 44. Temperature, Battery, and Supply Voltage Measurement SFRs SFR Address R/W Name Description 0xF9 R/W STRBPER Strobing Period Configuration (see Table 45). 0xF3 R/W DIFFPROG Temperature and Supply Delta Configuration (see Table 46). 0xD8 R/W ADCGO ADC Start Configuration (see Table 47). 0xFA R/W BATVTH Battery Threshold Configuration (see Table 48). 0xEF R/W VDCINADC VDCIN ADC Value (see Table 49). 0xDF R/W BATADC Battery ADC Value (see Table 50). 0xD7 R/W TEMPADC Temperature ADC Value (see Table 51). Table 45. Peripheral ADC Strobe Period SFR (STRBPER, 0xF9)1 Bit No. Mnemonic Default Description 7 to 6 Reserved – Reserved. Period for background external voltage measurements. VDCIN_PERIOD[1:0] Result 00 No VDCIN measurement 01 8 min 10 2 min 5 to 4 VDCIN_PERIOD[1:0] 0 11 1 min Period for background battery level measurements. BATT_PERIOD[1:0] Result 00 No battery measurement 01 16 min 10 4 min 3 to 2 BATT_PERIOD[1:0] 0 11 1 min Period for background temperature measurements. TEMP_PERIOD[1:0] Result 00 No temperature measurements 01 8 min 10 2 min 1 to 0 TEMP_PERIOD[1:0] 0 11 1 min 1 The strobing option only works when the RTCEN bit in RTC Configuration SFR (TIMECON, 0xA1) is set. |
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