K60P100M100SF2RM Datasheet, PDF (349/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 15 Low-leakage wake-up unit (LLWU)
15.3.8 LLWU Flag 3 Register (LLWU_F3)
LLWU_F3 contains the wakeup flags indicating which internal wakeup source caused the
MCU to exit LLS or VLLS mode. For LLS, this will be the source causing the CPU
interrupt flow. For VLLS, this will be the source causing the MCU reset flow.
For internal peripherals that are capable of running in LLS or VLLS mode, such as RTC
or CMP modules, the flag from the associated peripheral is accessible as the MWUFx bit.
Clearing of the flag will need to be done in the peripheral instead of writing a one to the
MWUFx bit.
NOTE
This register is unaffected by wakeup from low leakage modes
(exit from LLS via RESET or any exit from VLLS).
Address: LLWU_F3 is 4007_C000h base + 7h offset = 4007_C007h
Bit
Read
Write
Reset
7
MWUF7
w1c
0
6
MWUF6
0
5
MWUF5
0
4
MWUF4
0
3
MWUF3
0
2
MWUF2
0
1
MWUF1
0
0
MWUF0
0
LLWU_F3 field descriptions
Field
7
MWUF7
Wakeup flag for module 7 (Error Detect)
Description
Indicates that an unexpected source of wakeup was active when LLS or VLLS was entered. An immediate
wakeup event was triggered and the source of the wakeup event is not known. Error handling routines
should treat this source as an unknown wakeup. To clear the flag write a one to MWUF7.
6
MWUF6
0 Module 7 (Error Detect) input was not a source of wakeup from LLS or VLLS mode
1 Module 7 (Error Detect) input was a source of wakeup from LLS or VLLS mode
Wakeup flag for module 6
Indicates that an enabled internal peripheral was a source of exiting LLS or VLLS. To clear the flag follow
the internal peripheral flag clearing mechanism.
5
MWUF5
0 Module 6 input was not a source of wakeup from LLS or VLLS mode
1 Module 6 input was a source of wakeup from LLS or VLLS mode
Wakeup flag for module 5
Indicates that an enabled internal peripheral was a source of exiting LLS or VLLS. To clear the flag follow
the internal peripheral flag clearing mechanism.
0 Module 5 input was not a source of wakeup from LLS or VLLS mode
1 Module 5 input was a source of wakeup from LLS or VLLS mode
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
349