Information

Low-Leakage Wake-up
Unit (LLWU)
Power Management
Controller (PMC)
Peripheral
bridge 0
Register
access
Wake-up
requests
Module
Module
Figure 3-8. Low-Leakage Wake-up Unit configuration
Table 3-12. Reference links to related information
Topic Related module Reference
Full description LLWU LLWU
System memory map System memory map
Clocking Clock distribution
Power management Power management chapter
Power Management
Controller (PMC)
Power Management Controller (PMC)
Mode Controller Mode Controller
Wake-up requests LLWU wake-up sources
3.3.4.1 Wake-up Sources
This chip uses the following internal peripheral and external pin inputs as wakeup
sources to the LLWU module:
• LLWU_P0-15 are external pin inputs. Any digital function multiplexed on the pin
can be selected as the wakeup source. See the chip's signal multiplexing table for the
digital signal options.
• LLWU_M0IF-M7IF are connections to the internal peripheral interrupt flags.
NOTE
RESET is also a wakeup source, depending on the bit setting in
the LLWU_RST register. On devices where RESET is not a
dedicated pin, it must also be enabled in the explicit port mux
control.
Chapter 3 Chip Configuration
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 71