TM4C123BH6PGE Datasheet, PDF (509/1333 Pages) Texas Instruments – Tiva TM4C123BH6PGE Microcontroller

Tiva^™ TM4C123BH6PGE Microcontroller
Bit/Field
17
16
15
14:13
12:11
10
Name
OSCDRV
OSCBYP
reserved
VBATSEL
reserved
BATCHK
Type
RW
Reset
0
Description
Oscillator Drive Capability
This bit is used to compensate for larger or smaller filtering capacitors.
Note:
This bit is not meant to be changed once the Hibernation
oscillator has started. Oscillator stability is not guaranteed if
the user changes this value after the oscillator is running.
Value Description
0 Low drive strength is enabled, 12 pF.
1 High drive strength is enabled, 24 pF.
RW
0
Oscillator Bypass
Value Description
0 The internal 32.768-kHz Hibernation oscillator is enabled. This
bit should be cleared when using an external 32.768-kHz crystal.
1 The internal 32.768-kHz Hibernation oscillator is disabled and
powered down. This bit should be set when using a single-ended
oscillator attached to XOSC0.
RO
0
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.
RW
0x1
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.
Value Description
0x0 1.9 Volts
0x1 2.1 Volts (default)
0x2 2.3 Volts
0x3 2.5 Volts
RO
0x0
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.
RW
0
Check Battery Status
Value Description
0 When read, indicates that the low-battery comparator cycle is
not active.
Writing a 0 has no effect.
1 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.
June 12, 2014
509
Texas Instruments-Production Data