Process Change Notice #1310312 ____________________________________________________________________________________________________ User Registration Register today to create your account on Silabs.com. Your personalized profile allows you to receive technical document updates, new product announcements, “how-to” and design documents, product change notices (PCN) and other valuable content available only to registered users. http://www.silabs.com/profile PCN Date: 10/31/2013 Effective Date: 2/5/2014 Title: C8051F90x/F91x Revision D Originator: Atsushi Ninomiya Phone: 512-532-5828 Dept: Marketing Customer Contact: Kathy Haggar Phone: 512-532-5261 Dept: Sales PCN Type: Datasheet Foundry Packing Product Revision Assembly Labeling Discontinuance Test Other Last Order Date: Not Applicable. PCN Details Description of Change: Silicon Labs is pleased to announce hardware revision D of the C8051F90x/F91x devices and revision 1.3 of the corresponding datasheet for these products. For customers using Revision B the change to Revision D eliminates a potential issue with the RTC after a Sleep wake up in some applications. This behavior could occur in one-cell mode when VBAT falls below 1.5V and the MCU was in Sleep mode for ~100ms. If the behavior occurred, the RTC would either miss a clock period or change in frequency. This revision change also improved robustness of the device during VBAT ramp time that exceeds maximum datasheet specifications. For customers using Revision C the change to Revision D eliminates a potential issue with the RTC after a Sleep wake up in some applications. This behavior could occur in one-cell mode when VBAT falls below 1.5V and the MCU was in Sleep mode for ~100ms. If the behavior occurred, the RTC would either miss a clock period or change in frequency. Datasheet revision 1.3 updates the orderable part number to revision D along with other minor edits. After the effective date of this PCN, Silicon Labs reserves the right to deliver C8051F90x/F91x-DGM/GU (Revision D) for customers ordering C8051F90x/F91x-C-GM/GU (Revision C) or C8051F90x/F91x-GM/GU (Revision B). Reason for Change: C8051F90x/F91x Revision D release C8051F90x/F91x Datasheet revision 1.3 release W7206F1 Process Change Notice Form rev AJ The information contained in this document is PROPRIETARY to Silicon Laboratories, Inc. and shall not be reproduced or used in part or whole without Silicon Laboratories’ written consent. The document is uncontrolled if printed or electronically saved. Pg 4 Process Change Notice #1310312 ____________________________________________________________________________________________________ Impact on Form, Fit, Function, Quality, Reliability: There is no impact to form, fit, quality or reliability. The following functions are impacted: - The reset value of REVID SFR will read 0x03 for Revision D instead of 0x02 for Revision C or 0x01 for Revision B. - Behavior with the RTC after a Sleep wake up has been addressed. - (For customer currently using Revision B) Improved robustness of the device during VBAT ramp time that exceeds maximum datasheet specifications Product Identification: The following orderable part numbers are affected: After the effective date of this PCN, Silicon Labs reserves the right to deliver the C8051F90x/F91xD-GM/GU (Revision D) for customer ordering C8051F90x/F91x-C-GM/GU (Revision C) or C8051F90x/F91x-GM/GU (Revision B) Revision C Products C8051F901-C-GM C8051F901-C-GU C8051F902-C-GM C8051F902-C-GU C8051F911-C-GM C8051F911-C-GU C8051F912-C-GM C8051F912-C-GU Revision B Products C8051F901-GM C8051F901-GU C8051F902-GM C8051F902-GU C8051F911-GM C8051F911-GU C8051F912-GM C8051F912-GU Note: The part numbers above include tape and reel variants which are denoted with an “R” at the end of the orderable part number. Last Date of Unchanged Product: 2/5/2014 Qualification Samples: Samples are available now. Please contact your Silicon Labs sales representative to order samples. A list of Silicon Labs sales representatives is available at www.silabs.com. W7206F1 Process Change Notice Form rev AJ The information contained in this document is PROPRIETARY to Silicon Laboratories, Inc. and shall not be reproduced or used in part or whole without Silicon Laboratories’ written consent. The document is uncontrolled if printed or electronically saved. Pg 5 Process Change Notice #1310312 ____________________________________________________________________________________________________ Customer Early Acceptance Sign Off: Customers may approve early PCN acceptance by completing the information below: Early Acceptance: Date: Name: Company: Email your early Acceptance approval to: [email protected] Qualification Data: See Appendix. W7206F1 Process Change Notice Form rev AJ The information contained in this document is PROPRIETARY to Silicon Laboratories, Inc. and shall not be reproduced or used in part or whole without Silicon Laboratories’ written consent. The document is uncontrolled if printed or electronically saved. Pg 6 Process Change Notice #1310312 ____________________________________________________________________________________________________ Appendix W7206F1 Process Change Notice Form rev AJ The information contained in this document is PROPRIETARY to Silicon Laboratories, Inc. and shall not be reproduced or used in part or whole without Silicon Laboratories’ written consent. The document is uncontrolled if printed or electronically saved. Pg 7 Process Change Notice #1310312 ____________________________________________________________________________________________________ W7206F1 Process Change Notice Form rev AJ The information contained in this document is PROPRIETARY to Silicon Laboratories, Inc. and shall not be reproduced or used in part or whole without Silicon Laboratories’ written consent. The document is uncontrolled if printed or electronically saved. Pg 8 Process Change Notice #1310312 ____________________________________________________________________________________________________ W7206F1 Process Change Notice Form rev AJ The information contained in this document is PROPRIETARY to Silicon Laboratories, Inc. and shall not be reproduced or used in part or whole without Silicon Laboratories’ written consent. The document is uncontrolled if printed or electronically saved. Pg 9