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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS8218 датащи(PDF) 121 Page - ams AG |
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AS8218 датащи(HTML) 121 Page - ams AG |
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121 / 123 page  Data Sheet AS8218 / AS8228 Revision 3.0, 31-May-06 Page 121 of 123 ) mconst ( Rate Pulse LED ) ref ( PR Ni = Where PR(ref) is the reference meter constant. LED Meter Constant (non-standard): The LED pulses are derived directly from the fast internal pulses (204,800i/kWh) and is specified using the parameter ‘mconst’ of SREG. If the target meter constant is different from one of the selectable (mconst) meter constants, the following formula applies: ) Na Ni lev _ Pulse Ideal ( × Where Ni is calculated using the Target Pulse Rate: Rate Pulse et arg T t tan Cons Meter ference Re Ni = NB: For mconst, select a pulse rate close to Target Pulse Rate, so that the Pulse_lev stays within reasonable limits. 14. Terminology AFE - Analog front end CT - Current transformer DSP - Digital signal processor EEPROM - Electrically erasable programmable read only memory I_RAM - 8051 internal memory kB - kilobyte LBPx - LCD back-plane driver pin LCD - Liquid crystal display LCDD - Liquid crystal display driver LED - Light-emitting diode LP_DIV - Low power divider LP_OSC - Low power oscillator LSB - Least significant bit LSDx - LCD segment driver pin MCU - Microcontroller unit MDR - Meter data register (in DSP block) MPIO - Programmable multi-purpose input/output MSB - Most significant bit P_ACCU - Power accumulator for real power PF - Power factor PLP - Power low pass filter P_RAM - Program memory PSM - Power-supply monitor |
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