TWR-K60N512-KEIL Freescale Semiconductor, TWR-K60N512-KEIL Datasheet - Page 58

• Manufacturer Part Number: TWR-K60N512-KEIL
• Description: K60N512 Keil Tower Kit
• Manufacturer: Freescale Semiconductor
• Series: Kinetisr
• Type: MCUr

Specifications of TWR-K60N512-KEIL

• Rohs Compliant: YES
• Contents: 4 Boards, Documentation, DVD
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Freescale Tower System, K60N512

Using the low leakage wakeup unit
5.3
Using the low leakage wakeup unit
5.3.1 Overview
This section will demonstrate how to use the Low Leakage Wakeup Unit (LLWU). The
LLWU is responsible for selecting and enabling the sources of exit from all of the low
power modes of the MCU. This module works in conjunction with the PMC and the
MCU to wake the MCU up.
5.3.1.1 Mode transitions
There are particular requirements for exiting form each of the 10 power modes. Please
see
Mode transition requirements
for a table of the transition requirements for each of the
modes of operation.
5.3.1.2 Wakeup sources
There are a possible 16 pin sources and up to 7 modules available as sources of wakeup.
Please see
Source of wakeup, pins and modules
for a table of external pin wakeup and
module wakeup sources.
5.3.2 Configuration examples
There are five 8-bit wakeup source enable registers for the pin and module source
selection, Three 8-bit wakeup flag registers to indicate which wakeup source was
triggered, and one 8-bit status and control register to control the digital filter enable for
external pins, and an acknowledge bit to allow certain peripherals and pads to release
their held low leakage state.
5.3.2.1 Module wakeup
To configure a module to wakeup the MCU from one of the low power modes requires a
study in the control and function of each of the modules capable of waking the MCU.
Since the RTC can be on in all low power mode we can configure the RTC to wake up
Kinetis Quick Reference User Guide, Rev. 0, 11/2010
58
Freescale Semiconductor