15.3.7 LLWU Flag 2 register (LLWU_F2)LLWU_F2 contains the wakeup flags indicating which wakeup source caused the MCUto exit LLS or VLLS mode. For LLS, this is the source causing the CPU interrupt flow.For VLLS, this is the source causing the MCU reset flow.The external wakeup flags are read-only and clearing a flag is accomplished by a write ofa 1 to the corresponding WUFx bit. The wakeup flag (WUFx), if set, will remain set ifthe associated WUPEx bit is cleared.NOTEThis register is reset on Chip Reset not VLLS and by resettypes that trigger Chip Reset not VLLS. It is unaffected by resettypes that do not trigger Chip Reset not VLLS. See theIntroduction details for more information.Address: 4007_C000h base + 6h offset = 4007_C006hBit 7 6 5 4 3 2 1 0Read WUF15 WUF14 WUF13 WUF12 WUF11 WUF10 WUF9 WUF8Write w1c w1c w1c w1c w1c w1c w1c w1cReset 0 0 0 0 0 0 0 0LLWU_F2 field descriptionsField Description7WUF15Wakeup Flag For LLWU_P15Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. Toclear the flag write a one to WUF15.0 LLWU_P15 input was not a wakeup source1 LLWU_P15 input was a wakeup source6WUF14Wakeup Flag For LLWU_P14Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. Toclear the flag write a one to WUF14.0 LLWU_P14 input was not a wakeup source1 LLWU_P14 input was a wakeup source5WUF13Wakeup Flag For LLWU_P13Indicates that an enabled external wakeup pin was a source of exiting a low-leakage power mode. Toclear the flag write a one to WUF13.0 LLWU_P13 input was not a wakeup source1 LLWU_P13 input was a wakeup sourceTable continues on the next page...Chapter 15 Low-Leakage Wakeup Unit (LLWU)KL25 Sub-Family Reference Manual, Rev. 3, September 2012Freescale Semiconductor, Inc. 257
