FreescaleTWR-K70F120MMCU module development scheme

Freescale’s Kinetis K70 is a low-power 32-bit MCU with floating-point unit, graphic LCD, IEEE.1588 Ethernet MAC, full-speed and high-speed USB 2.0 OTG, encryption and tamper detection, using an ARM.Cortex™-M4 core that supports DSP instructions, integrated with 512KB or 1MB flash memory, are mainly used in automotive electronics, navigation, consumer electronics, household appliances, factory automation, building control, programmable logic control (PLC), smart grid and electricity meters, POS terminals, etc. This article introduces The main features, block diagrams of the Kinetis K70 device and the main features, block diagrams and circuit diagrams of the Kinetis K70 MCU module TWR-K70F120M are presented.

K70: Low-Power MCU with Floating Point Unit, Graphic LCD, Ethernet, USB, Encryption and Tamper Detect

Kinetis is the most scalable portfolio of low power, mixedsignal ARM.Cortex™-M4 MCUs in the industry. Phase 1 of the portfolio consists of five MCU families with over 200 pin-,peripheral- and software-compatible devices. Each family offers excellent performance, memory and feature scalability with common peripherals, memory maps, and packages providing easy migration both within and between families.

Kinetis MCUs are built from Freescale’s innovative 90nm Thin Film Storage (TFS) flash technology with unique FlexMemory. Kinetis MCU families combine the latest lowpower innovations and high performance, high precision mixed-signal capability with a broad range of connectivity, human-machine interface, and safety & security peripherals. Kinetis MCUs are supported by a market-leading enablement bundle from Freescale and numerous ARM 3rd party ecosystem partners.

The K70 MCU family includes an integrated graphic LCD controller, IEEE. 1588 Ethernet MAC, full- and high-speed USB 2.0 On-The-Go with device charger detect capability, hardware encryption and tamper detection capabilities. The K70 is available with 512 KB or 1 MB of flash memory in 196- and 256-pin MAPBGA packages. Each MCU includes a rich suite of analog, communication, timing and control peripherals. All K70 family devices include a single precision floating point unit and NAND flash controller. 256- pin versions include an on-chip DRAM controller for system expansion.

All Kinetis families include a powerful array of analog, communication and timing and control peripherals with the level of feature integration increasing with flash memory size and the number of inputs/outputs. Features common to all Kinetis families include:

• Core:

• ARM Cortex-M4 Core delivering 1.25 DMIPS/MHz with DSP instructions (floating-point unit available on certain Kinetis families)

• Up to 32-channel DMA for peripheral and memory servicing with minimal CPU intervention

• Broad range of performance levels rated at maximum CPU frequencies of 50 MHz, 72 MHz, 100 MHz, 120 MHz, and 150 MHz

• Ultra-low power:

• 10 low power operating modes for optimizing peripheral activity and wake-up times for extended battery life.

• Low–leakage wake-up unit, low power timer, and low power RTC for additional low power flexibility

• Industry-leading fast wake-up times

• Memory:

• Scalable memory footprints from 32 KB flash / 8 KB RAM to 1 MB flash / 128 KB RAM. Independent flash banks enable concurrent code execution and firmware updates

• Optional 16 KB cache memory for optimizing bus bandwidth and flash execution performance. Offered on K10, K20, and K60 family devices with CPU performance of up to 150 MHz.

• FlexMemory with up to 512 KB FlexNVM and up to 16 KB FlexRAM. FlexNVM can be partitioned to support additional program flash memory (ex. bootloader), data flash (ex. storage for large tables), or EEPROM backup. FlexRAM supports EEPROM byte -write/byte-erase operations and dictates the maximum EEPROM size.

• EEPROM endurance capable of exceeding 10 million cycles

• EEPROM erase/write times an order of magnitude faster than traditional EEPROM

Main features of K70 device:
FreescaleTWR-K70F120MMCU module development scheme
FreescaleTWR-K70F120MMCU module development scheme
Target application:




Home Appliances


Programmable Logic Control (PLC)

Electronic Point-of-Sales (ePOS) Terminals

Industrial Control

Smart Grid and Smart Metering

Building Control

Factory Automation
FreescaleTWR-K70F120MMCU module development scheme
Figure 1. K70 block diagram

TWR-K70F120M: Kinetis K70 MCU Module

The TWR-K70F120M is a Tower Controller Module compatible with the Freescale Tower System. It can function as a stand-alone, low-cost platform for the evaluation of the Kinetis K10, K20, K6x, and K70 family of microcontroller (MCU) devices . The TWR-K70F120M features the Kinetis K70 low-power microcontroller based on the ARM® Cortex™-M4 architecture with graphical LCD controller, tamper detection, USB 2.0 HS Controller, USB 2.0 full-speed OTG controller and 10/100 Mbps Ethernet MAC .

The TWR-K70F120M is available as a stand-alone product or as a kit (TWR-K70F120M-KIT) with the Tower Elevator Modules (TWR-ELEV) and the Tower Serial Module (TWR-SER). The TWR-K70F120M can also be combined with other Freescale Tower peripheral modules to create development platforms for a wide variety of applications. 0 provides an overview of the Freescale Tower System.

The TWR-K70F120M module includes:

The TWR-K70F120M contents include:

TWR-K70F120M board assembly

3ft USB cable

Interactive DVD with software installers and documentation

Quick Start Guide

Main features of TWR-K70F120M Tower MCU module:

The following list summarizes the features of the TWR-K70F120M Tower MCU Module:

Tower compatible microcontroller module

MK70FN1M0VMJ12: K70FN1M in a 256 MAPBGA with 120 MHz operation

Touch Tower Plug-in Socket

General purpose Tower Plug-in (TWRPI) socket

On-board JTAG debug circuit (OSJTAG) with virtual serial port

1Gb of DDR2 SDRAM memory

2Gb of SLC NAND flash memory

Three axis accelerometer (MMA8451Q)

Four (4) user-controllable LEDs

Four (4) capacitive touch pads

Two (2) user pushbutton switches


Battery Holder for 20mm lithium battery (eg 2032, 2025)

Micro-SD Card slot

FreescaleTWR-K70F120MMCU module development scheme
Figure 2. TWR-K70F120M Outline Drawing
FreescaleTWR-K70F120MMCU module development scheme
Figure 3. TWR-K70F120M block diagram
FreescaleTWR-K70F120MMCU module development scheme
Figure 4. TWR-K70F120M circuit diagram (1)
FreescaleTWR-K70F120MMCU module development scheme
Figure 5. TWR-K70F120M circuit diagram (2)
FreescaleTWR-K70F120MMCU module development scheme
Figure 6. TWR-K70F120M circuit diagram (3)
FreescaleTWR-K70F120MMCU module development scheme
Figure 7. TWR-K70F120M circuit diagram (4)
FreescaleTWR-K70F120MMCU module development scheme
Figure 8. TWR-K70F120M circuit diagram (5)
FreescaleTWR-K70F120MMCU module development scheme
Figure 9. TWR-K70F120M circuit diagram (6)
FreescaleTWR-K70F120MMCU module development scheme
Figure 10. TWR-K70F120M circuit diagram (7)

Figure 11. TWR-K70F120M circuit diagram (8)
For details, see: