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CDCE72010 데이터시트(PDF) 35 Page - Texas Instruments |
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CDCE72010 데이터시트(HTML) 35 Page - Texas Instruments |
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35 / 70 page ![]() CONFIGURATION DEFAULT MODE EEPROM PLL_LOCK REF_SEL POWERDOWN RESET HOLD or MODE_SEL AUX_SEL SPI_MISO SPI_LE(CD1) SPI_CLK(CD2) SPI_MOSI(CD3) Interface &Control RAMResistors PLL_LOCK REF_SEL POWERDOWN RESET HOLD or MODE_SEL AUX_SEL CD1 CD2 CD3 EEPROM Interface &Control RAMResistors CDCE72010 www.ti.com...................................................................................................................................................................................................... SCAS858 – JUNE 2008 The CDCE72010 has two modes of operation, SPI Interface and Configuration Default Mode. The Configuration Default mode is selected when MODE_SELECT Pin is driven low and it is used where SPI interface is not available. In the CD Mode configuration, the SPI interface Pins become static control pins CD1, CD2, CD3 and AUX_SEL as shown in the Pin description. The CD Mode signals are sampled only at power up or after Power Down are asserted. In CD Mode BYPASS, CD1 and CD2 are used to switch between EEPROM saved configurations. -CD1 allows swapping Divider and Phase Adjust value between output couples. • CD2 allows changing the output type for each output. • AUX_SEL Controls the Output Mux between VCXO and AUX Input. • CD3 must be grounded in CD Mode. Without any interface a single device with a single program can have multiple configurations that can be implemented on more than one socket. Figure 13. Writing to EEPROM via SPI Bus in Figure 14. Using CD1, CD2 to Control What is Copied Manufacutring, From EEPROM Into RAM Registers at Power Up 3rd Party Vendor or at TI Test Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 35 Product Folder Link(s): CDCE72010 |
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