C8051F98x/9x Revision C

PublishTime：2021-03-01

●Description of Change:
Silicon Labs is pleased to announce hardware revision C of the C8051F98x/F99x devices and revision 1.2 of the corresponding datasheet for these products, and hardware revision C of C8051F996 wafer sales and revision 1.2 of the corresponding datasheet.
Hardware revision C makes the following enhancements and modifications:
1. Changes the reset value of REVID SFR and REVID C2 will read 0x02 for Revision C instead of 0x01 for Revision B.
2. Eliminates a potential issue with the RTC after a sleep wake up in some applications.
This behavior could occur 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.
3. Improves the robustness of the device during VBAT ramp time that exceeds maximum datasheet specifications.
4. Adjusts the min, typ and max VDD brownout falling voltage threshold of the power onreset from 0.4V, 0.7V, and 1.0V respectively to 0.75V, 1.0V, and 1.3V respectively.
C8051F98x/9x datasheet revision 1.2 and C8051F996-C-GDI datasheet revision 1.2 updates the orderable part number to revision C along with other minor edits noted in the datasheet change notes. Two published errata and workarounds are now documented in the datasheet:
1. Address 0x0000 of XRAM
On device reset, or upon waking up from Sleep mode, address 0x0000 of external memory may be overwritten by an indeterminate value. The indeterminate value is 0x00 in most situations.
2. POR Supply Monitor for supply voltages greater than 2.4 V Description:
The POR Supply Monitor should not be disabled if the supply voltage is greater than 2.4 V.
After the effective date of this PCN, Silicon Labs reserves the right to deliver Revision C to customer ordering Revision B. Refer to Product Identification section of this PCN for details.
●Reason for Change:
C8051F98x/9x revision C release
C8051F98x/9x datasheet revision 1.2 release
C8051F996 revision C wafer sales release
C8051F996 datasheet revision 1.2 release
●Impact on Form, Fit, Function, Quality, Reliability:
The following functions are impacted:
-The reset valueof REVID SFR and REVID C2
-Behavior with the RTC after a Sleep wake up has been fixed
-The robustness of the device is improved during VDD ramp time that exceeds maximum datasheet specifications.
-Adjusted VDD brownout falling voltage thresholds

Brand of Product：	Silicon Labs
Part#：	C8051F98x 、 C8051F99x 、 C8051F996 、 C8051F980-GM 、 C8051F980-C-GM 、 C8051F980-GMR 、 C8051F980-C-GMR 、 C8051F981-GM 、 C8051F981-C-GM 、 C8051F981-GMR 、 C8051F981-C-GMR 、 C8051F982-GM 、 C8051F982-C-GM 、 C8051F982-GMR 、 C8051F982-C-GMR 、 C8051F983-GM 、 C8051F983-C-GM 、 C8051F983-GMR 、 C8051F983-C-GMR 、 C8051F985-GM 、 C8051F985-C-GM 、 C8051F985-GMR 、 C8051F985-C-GMR 、 C8051F986-GM 、 C8051F986-C-GM 、 C8051F986-GMR 、 C8051F986-C-GMR 、 C8051F986-GU 、 C8051F986-C-GU 、 C8051F986-GUR 、 C8051F986-C-GUR 、 C8051F987-GM 、 C8051F987-C-GM 、 C8051F987-GMR 、 C8051F987-C-GMR 、 C8051F987-GU 、 C8051F987-C-GU 、 C8051F987-GUR 、 C8051F987-C-GUR 、 C8051F988-GM 、 C8051F988-C-GM 、 C8051F988-GMR 、 C8051F988-C-GMR 、 C8051F988-GU 、 C8051F988-C-GU 、 C8051F988-GUR 、 C8051F988-C-GUR 、 C8051F989-GM 、 C8051F989-C-GM 、 C8051F989-GMR 、 C8051F989-C-GMR 、 C8051F989-GU 、 C8051F989-C-GU 、 C8051F989-GUR 、 C8051F989-C-GUR 、 C8051F990-GM 、 C8051F990-C-GM 、 C8051F990-GMR 、 C8051F990-C-GMR 、 C8051F991-GM 、 C8051F991-C-GM 、 C8051F991-GMR 、 C8051F991-C-GMR 、 C8051F996-GM 、 C8051F996-C-GM 、 C8051F996-GMR 、 C8051F996-C-GMR 、 C8051F996-GU 、 C8051F996-C-GU 、 C8051F996-GUR 、 C8051F996-C-GUR 、 C8051F997-GM 、 C8051F997-C-GM 、 C8051F997-GMR 、 C8051F997-C-GMR 、 C8051F997-GU 、 C8051F997-C-GU 、 C8051F997-GUR 、 C8051F997-C-GUR 、 C8051F996-GDI 、 C8051F996-C-GDI More Part#
Product Category：	Ultra Low-Power Microcontrollers More
Application：	More
Data Type：	PCN/EOL More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	10/29/2014
Version Number：	Revision C
Data Encoding：	#1410291
Data Size：	611 KB

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