LM3S3748 Datasheet, PDF (152/753 Pages) List of Unclassifed Manufacturers – Microcontroller

Hibernation Module
Bit/Field
6
5
4
3
2
1
Name
CLK32EN
LOWBATEN
PINWEN
RTCWEN
CLKSEL
HIBREQ
Type
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
Description
32-kHz Oscillator Enable
Value Description
0 Disabled
1 Enabled
This bit must be enabled to use the Hibernation module. If a crystal is
used, then software should wait 20 ms after setting this bit to allow the
crystal to power up and stabilize.
Low Battery Monitoring Enable
Value Description
0 Disabled
1 Enabled
When set, low battery voltage detection is enabled (VBAT < 2.35 V).
External WAKE Pin Enable
Value Description
0 Disabled
1 Enabled
When set, an external event on the WAKE pin will re-power the device.
RTC Wake-up Enable
Value Description
0 Disabled
1 Enabled
When set, an RTC match event (RTCM0 or RTCM1) will re-power the
device based on the RTC counter value matching the corresponding
match register 0 or 1.
Hibernation Module Clock Select
Value Description
0 Use Divide by 128 output. Use this value for a 4-MHz crystal.
1 Use raw output. Use this value for a 32-kHz oscillator.
0
Hibernation Request
Value Description
0 Disabled
1 Hibernation initiated
After a wake-up event, this bit is cleared by hardware.
152
April 08, 2008
Preliminary