mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 373

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

16.3.8 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 a low-leakage power 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.
Freescale Semiconductor, Inc.
WUF12
WUF11
WUF10
WUF9
WUF8
Field
4
3
2
1
0
Wakeup Flag for LLWU_P12
Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. To
clear the flag write a one to WUF12.
0
1
Wakeup Flag for LLWU_P11
Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. To
clear the flag write a one to WUF11.
0
1
Wakeup Flag for LLWU_P10
Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. To
clear the flag write a one to WUF10.
0
1
Wakeup Flag for LLWU_P9
Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. To
clear the flag write a one to WUF9.
0
1
Wakeup Flag for LLWU_P8
Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. To
clear the flag write a one to WUF8.
0
1
LLWU_P12 input was not a wakeup source
LLWU_P12 input was a wakeup source
LLWU_P11 input was not a wakeup source
LLWU_P11 input was a wakeup source
LLWU_P10 input was not a wakeup source
LLWU_P10 input was a wakeup source
LLWU_P9 input was not a wakeup source
LLWU_P9 input was a wakeup source
LLWU_P8 input was not a wakeup source
LLWU_P8 input was a wakeup source
LLWU_F2 field descriptions (continued)
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Preliminary
Description
Chapter 16 Low Leakage Wakeup Unit (LLWU)
373