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TDA7421N Datasheet(PDF) 22 Page - STMicroelectronics |
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TDA7421N Datasheet(HTML) 22 Page - STMicroelectronics |
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22 / 38 page  TDA7421N 22/38 CONTROL REGISTER FUNCTION Figure 6. IF Counter Block Diagram REGISTER NAME FUNCTION PC Programmable Counter for VCO Frequency RC Reference Counter PLL IRC Reference Counter IF IFCM IF Counter Mode EW Frequency Error Window IFENA Enable IF Counter CF Center Frequency IF Counter IFS Sampling Time IF Counter PM Stby, FM, AM, AM swallow mode (PLL Mode) D Programmable Delay for Lock Detector LPIN1/2 Loop Filter Input Select A Charge Pump High Current B Charge Pump Low Current LDENA Lock Detector Enable CURRH Set Current High 11-21 BIT COUNTER CF-REGISTER 3 BIT COUNTER 14 BIT COUNTER ZD IFS-REGISTER IFC-REGISTER EW-REGISTER UP/DOWN COUNTER IFENA IF-AM IF-FM OSC D97AU809 |
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