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CDCE401 Datasheet(PDF) 7 Page - Texas Instruments |
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CDCE401 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 19 page www.ti.com TYPICAL CYCLE, PROGRAMMING THREE WORDS INTO EEPROM EnterProgramming Sequence Word0 After8bits,thepayload dataistransferredto theRAMandisactive. Waitforatleast 10msbefore exitingEEPROM writephase,for safeoperation. Payload Word1 Payload Word2 Payload State Machine Jump State Machine Jump State2 ® State3 State3 ® State1 T0043-02 TYPICAL WRITE/VERIFY/PROGRAM CYCLE CDCE401 SCAS820 – JUNE 2006 Figure 3 shows an enter register programming mode and how the different words can be written. Bold highlights the addressing of word0–word2. After that, the payload for the respective word is clocked in. In this example, this is followed by a jump from state 2 → state 3 into enter EEPROM programming with EEPROM lock. In the EEPROM-programming state, it is necessary to wait at least 10 ms for safe programming. The last command is a jump from state 3 into state 1 (normal operation). Figure 3. EEPROM Programming Example As stated previously in this document, for safe writing and programming, the supply voltage must be held within a narrow window of 3.2 V ±100 mV. Figure 1 illustrates writing to the device and verifying the settings, followed by a safe programming into EEPROM. 7 Submit Documentation Feedback |
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