topic Re: RFVBAT and RFSYS in Kinetis MCU in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/RFVBAT-and-RFSYS-in-Kinetis-MCU/m-p/600154#M35229 <HTML><HEAD></HEAD><BODY><P>Hi Mohamed Ismail Bari,</P><P></P><P>&nbsp;&nbsp;&nbsp; Actually, the description in the reference manual for System register file(RFSYS_REGn) and the VBAT regsiter file(RFVBAT_REGn) is enough!</P><P>&nbsp; There has no other document about it.</P><P></P><P>3.5.4.1 System Register file<BR />This device includes a 32-byte register file that is powered <STRONG>in all power modes</STRONG>. The System Register file is made up of eight 4-byte registers RFSYS_REGn, where n ranges<BR />from 0 to 7.<BR />Also, it <STRONG>retains contents during low-voltage detect (LVD) events and is only reset during a power-on reset.</STRONG></P><P></P><P>3.5.5.1 VBAT register file<BR />This device includes a 32-byte register file that is<STRONG> powered in all power modes and is powered by VBAT</STRONG>. The VBAT Register file is made up of eight 4-byte registers<BR />RFVBAT_REGn, where n ranges from 0 to 7.<BR />It is only <STRONG>reset during VBAT power-on reset.</STRONG></P><P></P><P>In all power modes, as you know, in VLLS0,VLLS1, the RAM is not retained, so you can put the important data in these register to save the data when you enter VLLS0, VLLS1 mode.</P><P></P><P>Wish it helps you!</P><P></P><P></P><P><BR />Have a great day,<BR />Kerry</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 12 Jan 2017 02:54:52 GMT kerryzhou 2017-01-12T02:54:52Z RFVBAT and RFSYS in Kinetis MCU https://community.nxp.com/t5/Kinetis-Microcontrollers/RFVBAT-and-RFSYS-in-Kinetis-MCU/m-p/600153#M35228 <HTML><HEAD></HEAD><BODY><P>Can someone point me to a datasheet on RFSYS or RFVBAT peripheral in Kinetis devices?</P><P></P><P>I know RFVBAT is a register file in VBAT domain. But I have no clue about RFSYS - except that it is also a group of registers. The K22, K60, K81 mcu header files have definitions for these peripherals. But the&nbsp;datasheet or the reference manuals do not have a word about them.&nbsp;</P><P></P><P>Is there a separate manual for these peripherals or am I missing something?</P><P></P><P>Thanks,</P><P>-Ismail</P></BODY></HTML> Tue, 10 Jan 2017 12:55:33 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/RFVBAT-and-RFSYS-in-Kinetis-MCU/m-p/600153#M35228 izmile 2017-01-10T12:55:33Z Re: RFVBAT and RFSYS in Kinetis MCU https://community.nxp.com/t5/Kinetis-Microcontrollers/RFVBAT-and-RFSYS-in-Kinetis-MCU/m-p/600154#M35229 <HTML><HEAD></HEAD><BODY><P>Hi Mohamed Ismail Bari,</P><P></P><P>&nbsp;&nbsp;&nbsp; Actually, the description in the reference manual for System register file(RFSYS_REGn) and the VBAT regsiter file(RFVBAT_REGn) is enough!</P><P>&nbsp; There has no other document about it.</P><P></P><P>3.5.4.1 System Register file<BR />This device includes a 32-byte register file that is powered <STRONG>in all power modes</STRONG>. The System Register file is made up of eight 4-byte registers RFSYS_REGn, where n ranges<BR />from 0 to 7.<BR />Also, it <STRONG>retains contents during low-voltage detect (LVD) events and is only reset during a power-on reset.</STRONG></P><P></P><P>3.5.5.1 VBAT register file<BR />This device includes a 32-byte register file that is<STRONG> powered in all power modes and is powered by VBAT</STRONG>. The VBAT Register file is made up of eight 4-byte registers<BR />RFVBAT_REGn, where n ranges from 0 to 7.<BR />It is only <STRONG>reset during VBAT power-on reset.</STRONG></P><P></P><P>In all power modes, as you know, in VLLS0,VLLS1, the RAM is not retained, so you can put the important data in these register to save the data when you enter VLLS0, VLLS1 mode.</P><P></P><P>Wish it helps you!</P><P></P><P></P><P><BR />Have a great day,<BR />Kerry</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 12 Jan 2017 02:54:52 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/RFVBAT-and-RFSYS-in-Kinetis-MCU/m-p/600154#M35229 kerryzhou 2017-01-12T02:54:52Z Re: RFVBAT and RFSYS in Kinetis MCU https://community.nxp.com/t5/Kinetis-Microcontrollers/RFVBAT-and-RFSYS-in-Kinetis-MCU/m-p/600155#M35230 <HTML><HEAD></HEAD><BODY><P>Thanks Kerry.&nbsp;</P></BODY></HTML> Thu, 12 Jan 2017 12:45:33 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/RFVBAT-and-RFSYS-in-Kinetis-MCU/m-p/600155#M35230 izmile 2017-01-12T12:45:33Z