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.
0ROreserved15
Select for Low-Battery Comparator
This field selects the battery level that is used when checking the battery
status. If the battery voltage is below the specified level, the LOWBAT
interrupt bit in the HIBRIS register is set.
DescriptionValue
1.9 Volts0x0
2.1 Volts (default)0x1
2.3 Volts0x2
2.5 Volts0x3
0x1RWVBATSEL14:13
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.
0x0ROreserved12:11
Check Battery Status
DescriptionValue
When read, indicates that the low-battery comparator cycle is
not active.
Writing a 0 has no effect.
0
When read, indicates the low-battery comparator cycle has not
completed.
Setting this bit initiates a low-battery comparator cycle. If the
battery voltage is below the level specified by VBATSEL field,
the LOWBAT interrupt bit in the HIBRIS register is set. A
hibernation request is held off if a battery check is in progress.
1
0RWBATCHK10
Wake on Low Battery
DescriptionValue
The battery voltage level is not automatically checked. Low
battery voltage does not cause the microcontroller to wake from
hibernation.
0
In RTC mode, when this bit is set, the battery voltage level is
checked every 512 seconds while in hibernation.
In calendar mode, the battery voltage is checked on minutes
divisible by 8 while in hibernation.
If the voltage is below the level specified by VBATSEL field, the
microcontroller wakes from hibernation and the LOWBAT interrupt
bit in the HIBRIS register is set.
1
0RWBATWKEN9
559June 18, 2014
Texas Instruments-Production Data
Tiva
™
TM4C1294NCPDT Microcontroller
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