Information

Table 2-1. Module functional categories (continued)

Module category Description

Clocks • Multiple clock generation options available from internally- and externally-

generated clocks

• System oscillator to provide clock source for the MCU

• RTC oscillator to provide clock source for the RTC

Security • Cyclic Redundancy Check module for error detection

Analog • High speed analog-to-digital converter with integrated programmable gain

amplifier

• Comparator

• Internal voltage reference

Timers • Programmable delay block

• FlexTimers

• Periodic interrupt timer

• Low power timer

• Carrier modulator transmitter

• Independent real time clock

Communications • USB OTG controller with built-in FS/LS transceiver

• USB device charger detect

• USB voltage regulator

• Serial peripheral interface

• Inter-integrated circuit (I

• UART

• Integrated interchip sound (I

Human-Machine Interfaces (HMI) • General purpose input/output controller

• Capacitive touch sense input interface enabled in hardware

2.4.1 ARM Cortex-M4 Core Modules

The following core modules are available on this device.

Table 2-2. Core modules

Module Description

ARM Cortex-M4 The ARM Cortex-M4 is the newest member of the Cortex M Series of processors

targeting microcontroller cores focused on very cost sensitive, deterministic,

interrupt driven environments. The Cortex M4 processor is based on the ARMv7

Architecture and Thumb®-2 ISA and is upward compatible with the Cortex M3,

Cortex M1, and Cortex M0 architectures. Cortex M4 improvements include an

ARMv7 Thumb-2 DSP (ported from the ARMv7-A/R profile architectures) providing

32-bit instructions with SIMD (single instruction multiple data) DSP style multiply-

accumulates and saturating arithmetic.

Table continues on the next page...

Chapter 2 Introduction

K20 Sub-Family Reference Manual, Rev. 2, Feb 2012

Freescale Semiconductor, Inc. 51