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3.10 In-Circuit Programming
The Si5332 is in-system configurable using the I
2
C interface by the following two methods:
•
In-ciruit configuration of device registers after power-up.
With this method changes to volatile register memory can be done as re-
quired to produce the desired outputs. This does not alter internal NVM; therefore, register memory changes are lost at power-down.
Refer to the
Si5332 Family Reference Manual
available on our web site for details.
•
In-circuit re-configuration of internal NVM.
Writing to internal NVM requires the use of the CBPro Field Programmer (CBPROG-DON-
GLE) and CBPro software. See
UG286: ClockBuilderPro Field Programmer Kit
user's guide available on our web site for more
information. (One important note: The Si5332 core VDDs (VDD_DIG, VDDA, and VDD_XTAL) must be powered by 3.3 V during
in-circuit NVM programming.)
• VDD core voltages (VDD_DIG, VDDA, VDD_XTAL) must be 3.3 V for in-circuit programming. Using VDD core voltage lower than 3.3
V (i.e., 2.5 V or 1.8 V) will not support reliable in-circuit NVM programming.
Si5332 Data Sheet • Functional Description
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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Rev. 1.3 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 16, 2021
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