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SMM105 Single-Channel Supply Voltage Marginer and Active DC Output Controller Windows GUI Users Guide and Configuration Register Descriptions

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Register R0C - VREF_CNTL Settings R0C can only be changed if the external VREF option is chosen in R04. Register R0C is combined with register R0D to set the VREF_CNTL voltage value. The value can be read from the register with the default setting or written into the register with the corrected external VREF value so that the Nominal, High and Low values are calculated correctly in registers R00 &endash; R03. The value should be set to the nominal data sheet voltage value of the chosen external VREF. For example, if a 2.0V external VREF is used, VREF_CNTL should be set to 2.000V.

Register R0D - VREF_CNTL Settings These register bits are combined with the register R0C to set the VREF_CNTL voltage value.

Figure 12 - Register R0C and R0D VREF_CNTL Windows GUI Tab

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SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission. SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances. Revision 1.1 - This document supersedes all previous. Please check the Summit Microelectronics, Inc. web site at www.summitmicro.com for updates. I2C is a trademark of Philips Corporation.

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