Table 2-2. Core modules (continued)
Module Description
AWIC The primary function of the Asynchronous Wake-up Interrupt Controller (AWIC) is
to detect asynchronous wake-up events in stop modes and signal to clock control
logic to resume system clocking. After clock restart, the NVIC observes the
pending interrupt and performs the normal interrupt or event processing.
Debug interfaces Most of this device's debug is based on the ARM CoreSight
â„¢
architecture. Four
debug interfaces are supported:
• IEEE 1149.1 JTAG
• IEEE 1149.7 JTAG (cJTAG)
• Serial Wire Debug (SWD)
• ARM Real-Time Trace Interface
2.2.2 System Modules
The following system modules are available on this device.
Table 2-3. System modules
Module Description
System integration module (SIM) The SIM includes integration logic and several module configuration settings.
System mode controller The SMC provides control and protection on entry and exit to each power mode,
control for the Power management controller (PMC), and reset entry and exit for
the complete MCU.
Power management controller (PMC) The PMC provides the user with multiple power options that allow the user to
optimize power consumption for the level of functionality needed. Includes power-
on-reset (POR) and integrated low voltage detect (LVD) with reset (brownout)
capability and selectable LVD trip points.
Low-leakage wakeup unit (LLWU) The LLWU module allows the device to wake from low leakage power modes (LLS
and VLLS) through various internal peripheral and external pin sources.
Miscellaneous control module (MCM) The MCM includes integration logic
Crossbar switch (XBS) The XBS connects bus masters and bus slaves, allowing all bus masters to access
different bus slaves simultaneously and providing arbitration among the bus
masters when they access the same slave.
Peripheral bridges The peripheral bridge converts the crossbar switch interface to an interface to
access a majority of peripherals on the device.
DMA multiplexer (DMAMUX) The DMA multiplexer selects from many DMA requests down to a smaller number
for the DMA controller.
Direct memory access (DMA) controller The DMA controller provides programmable channels with transfer control
descriptors for data movement via dual-address transfers for 8-bit, 16-bit, 32-bit,
16-byte and 32-byte data values.
External watchdog monitor (EWM) The EWM is a redundant mechanism to the software watchdog module that
monitors both internal and external system operation for fail conditions.
Software watchdog (WDOG) The WDOG monitors internal system operation and forces a reset in case of
failure. It can run from an independent 1 KHz low power oscillator with a
programmable refresh window to detect deviations in program flow or system
frequency.
Chapter 2 Introduction
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 51
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