Register 9: Hibernation RTC Trim (HIBRTCT), offset 0x024
This register contains the value that is used to trim the RTC clock predivider. It represents the
computed underflow value that is used during the trim cycle. It is represented as 0x7FFF ± N clock
cycles, where N is the number of clock cycles to add or subtract every 64 seconds in RTC mode or
60 seconds in calendar mode.
Note: Except for the HIBIO and a portion of the HIBIC register, all other Hibernation module
registers are on the Hibernation module clock domain and have special timing requirements.
Software should make use of the WRC bit in the HIBCTL register to ensure that the required
timing gap has elapsed. If the WRC bit is clear, any attempted write access is ignored. See
“Register Access Timing” on page 535. The HIBIO register and bits RSTWK, PADIOWK and
WC of the HIBIC register do not require waiting for write to complete. Because these registers
are clocked by the system clock, writes to these registers/bits are immediate.
Writing to registers other than the HIBCTL and HIBIM before the CLK32EN bit in the HIBCTL
register has been set may produce unexpected results.
Hibernation RTC Trim (HIBRTCT)
Base 0x400F.C000
Offset 0x024
Type RW, reset 0x0000.7FFF
16171819202122232425262728293031
reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
0123456789101112131415
TRIM
RWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWType
1111111111111110Reset
DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x0000ROreserved31:16
RTC Trim Value
This value is loaded into the RTC predivider every 64 seconds in RTC
counter mode.
In calendar mode, the value is loaded every 60 seconds.
It is used to adjust the RTC rate to account for drift and inaccuracy in
the clock source. Compensation can be adjusted by software by moving
the default value of 0x7FFF up or down. Moving the value up slows
down the RTC and moving the value down speeds up the RTC.
0x7FFFRWTRIM15:0
June 18, 2014570
Texas Instruments-Production Data
Hibernation Module
To Next Page
Loading...
Need help?
General
