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UPD178016 Scheda tecnica(PDF) 21 Page - NEC |
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UPD178016 Scheda tecnica(HTML) 21 Page - NEC |
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21 / 56 page ![]() 21 µPD178004, 178006, 178016, 178018 5.7 PLL FREQUENCY SYNTHESIZER Figure 5-10. PLL Frequency Synthesizer Block Diagram Internal Bus Internal Bus PLL Mode Select Register PWM Data Transfer Register PLL NS0 PLL MD0 PLL MD1 PLL RF2 PLL RF1 PLL RF0 PLL UL0 EOC ON0 EO Select Register PLL Reference Mode Register PLL Unlock FF Judge Register PLL RF3 2 Input Select Block Programmable Divider Phase Comparator ( -DET) Unlock FF Reference Frequency Generator 4.5 MHz 4 Charge Pump EO1 EO0 VCOH VCOL Mixer 2 fN fr PLL Data Register (PLLRL, PLLRH, PLLR0) φ Voltage Control Generator Low pass Filter Note Note Note External circuit |
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