RFVBAT and RFSYS in Kinetis MCU

[izmile]

Can someone point me to a datasheet on RFSYS or RFVBAT peripheral in Kinetis devices?

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 datasheet or the reference manuals do not have a word about them. 

Is there a separate manual for these peripherals or am I missing something?

Thanks,

-Ismail

[izmile]

Thanks Kerry. 

[kerryzhou · Accepted solution]

Hi Mohamed Ismail Bari,

    Actually, the description in the reference manual for System register file(RFSYS_REGn) and the VBAT regsiter file(RFVBAT_REGn) is enough!

  There has no other document about it.

3.5.4.1 System Register file
This device includes a 32-byte register file that is powered in all power modes. The System Register file is made up of eight 4-byte registers RFSYS_REGn, where n ranges
from 0 to 7.
Also, it retains contents during low-voltage detect (LVD) events and is only reset during a power-on reset.

3.5.5.1 VBAT register file
This device includes a 32-byte register file that is powered in all power modes and is powered by VBAT. The VBAT Register file is made up of eight 4-byte registers
RFVBAT_REGn, where n ranges from 0 to 7.
It is only reset during VBAT power-on reset.

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.

Wish it helps you!

Have a great day,
Kerry

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