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STR91XF Arkusz danych(PDF) 47 Page - STMicroelectronics |
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STR91XF Arkusz danych(HTML) 47 Page - STMicroelectronics |
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47 / 73 page ![]() STR91xF Electrical characteristics 47/73 6.2 Operating conditions Table 5. Operating conditions Notes: 1 The VBATT pin should be connected to VDDQ if no battery is installed 6.3 LVD electrical characteristics VDDQ = 2.7 - 3.6V, VDD = 1.65 - 2V, TA = -40 / 85 °C unless otherwise specified. Table 6. LVD Electrical Characteristics Notes: 1 For VDDQ I/O voltage operating at 2.7 - 3.3V. 2 For VDDQ I/O voltage operating at 3.0 - 3.6V. 3 Selection of VDDQ operation range is made using configuration software from ST, or IDE from 3rd parties. The default condition is VDDQ=2.7V - 3.3V. Symbol Parameter Test Conditions Value Unit Min Max VDD Digital CPU supply voltage 1.65 2.0 V VDDQ Digital I/O supply voltage 2.7 3.6 V VBATT (1) SRAM backup and RTC supply voltage 2.5 3.6 V AVDD Analog ADC supply voltage (128-pin package) 2.7 3.6 V AVREF Analog ADC reference voltage (128-pin package) 1.0 3.6 V AVREF_AVDD Combined analog ADC reference and ADC supply voltage (80-pin package) 2.7 3.6 V TA Ambient temperature under bias -40 +85 C Symbol Parameter Test Conditions Value Unit Min Typ Max VDD_LVD VDD LVD Threshold 1.35 1.4 1.45 V VDDQ_LVD VDDQ LVD Threshold (1) 2.35 2.4 2.45 V (2) 2.65 2.7 2.75 VDD_BRN VDD Brown Out Warning Threshold 1.61.651.7 V VDDQ_BRN VDDQ Brown Out Warning Threshold (1) 2.6 2.65 2.7 V (2) 2.9 2.95 3.0 |
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