NXP Semiconductors MKW01Z128, Reference Manual, Page: 336 / 884

When the wake-up pin filters are enabled, filter operation begins immediately. If a low
leakage mode is entered within five LPO clock cycles of an active edge, the edge event
will be detected by the LLWU.
11.2.2.4 Debug mode
When the chip is in Debug mode and then enters LLS or a VLLSx mode, no debug logic
works in the fully-functional low-leakage mode. Upon an exit from the LLS or VLLSx
mode, the LLWU becomes inactive.
11.2.3 Block diagram
The following figure is the block diagram for the LLWU module.
Chapter 11 Low-Leakage Wakeup Unit (LLWU)
MKW01Z128 MCU Reference Manual, Rev. 3, 04/2016
Freescale Semiconductor, Inc. 205