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AZT71_1301 Arkusz danych(PDF) 4 Page - Arizona Microtek, Inc |
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AZT71_1301 Arkusz danych(HTML) 4 Page - Arizona Microtek, Inc |
4 / 14 page Arizona Microtek, Inc. AZT71 Programmable Capacitive Tuning IC www.azmicrotek.com +1-480-962-5881 4 Request a Sample Jan 2013, Rev 1.3 OSCILLATOR APPLICATION In oscillator applications, the AZT71 is designed to be used in 2 phases, Programming and Operational. In the Programming phase, the AZT71 is used by the manufacturer to set the capacitance value to control the desired center frequency of the oscillator. The programming phase gives the manufacturer access to pins DA, CLK, and PV where the shift registers are used to first determine the required control word. That control word is then stored in the EEPROM memory. Arizona Microtek can provide the programming board (AZPB70) along with software that works through all the programming steps/functions described in the next sections (Figure 4). In the Operational phase, the EEPROM memory internal to the AZT71 has already been programmed with the desired factory settings. Pins DA, CLK, and PV are to be disconnected, thereby allowing the AZT71’s internal pull-downs to place the pins at ground potential. In the operational mode, only 3 pins are necessary for hookup (Figure 5). AZT71 Programming Board (AZPB70) X1 DA CLK PV DA CLK PV VSS VDD RESONATOR OUT OSCILLATOR Figure 4 – AZT71 in Programming Mode AZT71 X1 DA CLK PV VSS VDD RESONATOR OUT OSCILLATOR NC NC NC Figure 5 – AZT71 in Operational Mode |
Podobny numer części - AZT71_1301 |
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Podobny opis - AZT71_1301 |
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