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AZT71QG Datenblatt(PDF) 5 Page - Arizona Microtek, Inc |
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AZT71QG Datenblatt(HTML) 5 Page - Arizona Microtek, Inc |
5 / 14 page Arizona Microtek, Inc. AZT71 Programmable Capacitive Tuning IC www.azmicrotek.com +1-480-962-5881 5 Request a Sample May 2012, Rev 1.2 AZT71 Programming Board (PRT70) X1 DA CLK PV DA CLK PV VSS VDD RESONATOR OUT OSCILLATOR Figure 5 – AZT71 in Programming Mode AZT71 X1 DA CLK PV VSS VDD RESONATOR OUT OSCILLATOR NC NC NC Figure 6 – AZT71 in Operational Mode PROGRAMMING MODES The AZT71 has two capacitance setting modes from which bits are set and the matching capacitors are selected. • Reading directly from the shift register o This is useful for testing the capacitance and subsequent oscillator frequency. This mode is active after the last bit is shifted in and when the CLK pin is left logic high. For the shift register, capacitors are selected when bits are active HIGH. • Reading from the value contained in the EEPROM o Prevents customer adjustment and retains factory programming and is active when the CLK pin is at logic low or not connected. For the EEPROM, capacitors are selected when bits are active LOW. |
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