K60P100M100SF2RM Datasheet, PDF (336/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Introduction
15.1.1 Features
The LLWU module features include:
• Supports up to 16 external input pins and up to 7 internal modules with individual
enable bits
• Input sources may be external pins or from internal peripherals capable of running in
LLS or VLLS. See the Chip Configuration details for wakeup input sources for this
device.
• Each external pin wakeup input is programmable as falling edge, rising edge, or any
change
• Each internal module wakeup input source qualified with programmable enable
• Wakeup inputs are activated if enabled once MCU enters low leakage stop (LLS) or
very low leakage stop (VLLS) modes
• Reset exit due to assertion of RESET pin via reset flow. I/O states are reset on exit
• Wakeup from LLS mode is handled as an interrupt. I/O states are released on exit
• Wakeup exit via reset flow when MCU is in VLLS. I/O states remain in held state
until wakeup has been acknowledged.
• An optional digital filter provided to qualify an external pin detect and RESET pin
detect.
15.1.2 Modes of operation
The LLWU module is only functional in LLS and VLLS modes.
15.1.2.1 LLS mode
The LLWU module provides up to 16 external wakeup inputs and up to seven internal
module wakeup inputs. In addition, an LLS reset event can be initiated via assertion of
the RESET pin.
Wakeup events due to external wakeup inputs and internal module wakeup inputs result
in an interrupt flow when exiting LLS. A reset event due to RESET pin assertion results
in a reset flow when exiting LLS.
NOTE
The LLWU interrupt must not be masked by the interrupt
controller to avoid a scenario where the system does not fully
exit stop mode on an LLS recovery.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
336
Freescale Semiconductor, Inc.