Freescale TWR-K40X256 Tower系统开发评估方案

发布时间：2011-7-6 17:02 发布者：Liming

Freescale公司的TWR-K40X256采用基于ARM® Cortex™-M4架构的Kinetis K40低功耗MCU,集成了USB 2.0全速OTG和LCD显示控制器,包括有256KB程序闪存和256KB FlexMemory非易失存储器,以及模拟,通信,时序和控制接口,主要用在血糖仪,GPS接收器, 点钞机和自行车码表.本文介绍了K40 MCU系列主要特性,方框图, TWR-K40X256 Tower控制器模块主要特性, 方框图和详细电路图.

The K40 MCU family is pin, peripheral and software compatible with the K10 MCU family and adds full-speed USB 2.0 On-The-Go with device charge detect capability and a flexible low-power segment LCD controller with support for up to 320 segments. Devices start from 64 KB of flash in 64QFN packages extending up to 512 KB in a 144MAPBGA package with a rich suite of analog, communication, timing and control peripherals.

K40 MCU系列主要特性:

• Operating Characteristics

– Voltage range: 1.71 to 3.6 V

– Flash write voltage range: 1.71 to 3.6 V

– Temperature range (ambient): -40 to 105℃

•

erformance

– Up to 100 MHz ARM Cortex-M4 core with DSP instructions delivering 1.25 Dhrystone MIPS per MHz

•Memories and memory interfaces

– Up to 512 KB program flash memory on non-FlexMemory devices

– Up to 128 KB RAM

– Serial programming interface (EzPort)

•Clocks

– 3 to 32 MHz crystal oscillator

– 32 kHz crystal oscillator

– Multi-purpose clock generator

•System peripherals

– 10 low-power modes to provide power optimization based on application requirements

– Memory protection unit with multi-master protection

– 16-channel DMA controller, supporting up to 64 request sources

– External watchdog monitor

– Software watchdog

– Low-leakage wakeup unit

•Security and integrity modules

– Hardware CRC module to support fast cyclic redundancy checks

– 128-bit unique identification (ID) number per chip

•Human-machine interface

– Segment LCD controller supporting up to 40 frontplanes and 8 backplanes, or 44 frontplanes and 4 backplanes

– Low-power hardware touch sensor interface (TSI)

– General-purpose input/output

•Analog modules

– Two 16-bit SAR ADCs

– Programmable gain amplifier (PGA) (up to x64) integrated into each ADC

– 12-bit DAC

– Three analog comparators (CMP) containing a 6-bit DAC and programmable reference input

– Voltage reference

•Timers

– Programmable delay block

– Eight-channel motor control/general purpose/PWM timer

– Two 2-channel quadrature decoder/general purpose timers

– Periodic interrupt timers

16-bit low-power timer

– Carrier modulator transmitter

– Real-time clock

•Communication interfaces

– USB full-/low-speed On-the-Go controller with onchip transceiver

– Two Controller Area Network (CAN) modules

– Three SPI modules

– Two I2C modules

– Five UART modules

– Secure Digital host controller (SDHC)

– I2S module

K40 MCU目标应用:

GPS receivers

Blood glucose meters

Bike computers

Currency counters

图1.K40 MCU系列方框图

TWR-K40X256 Tower控制器模块

The TWR-K40X256 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 K30 and K40 family of microcontroller (MCU) devices. The TWRPI-SLCD segment LCD daughter card is included as part of the TWR-K40X256.

The TWR-K40X256 features the Kinetis K40 low-power microcontroller based on the ARM® Cortex™-M4 architecture with USB 2.0 full-speed OTG and segment LCD display controllers. The K40X256 includes 256Kbytes of program flash storage and an additional 256Kbytes of FlexMemory non-volatile storage that can be used as additional program flash memory, data flash, or variable size/endurance EEPROM.

The TWR-K40X256 is available as a stand-alone product or as a kit (TWR-K40X256-KIT) with the Tower Elevator Modules (TWR-ELEV) and the Tower Serial Module (TWR-SER). The TWR-K40X256 can also be combined with other Freescale Tower peripheral modules to create development platforms for a wide variety of applications.

The TWR-K40X256 is a Tower Controller Module featuring the MK40X256VMD100—an ARM Cortex-M4 based microcontroller with segment LCD and USB 2.0 full-speed OTG controllers in a 144 MAPBGA package with a maximum core operating frequency of 100MHz. It is intended for use in the Freescale Tower System but can operate stand-alone. An on-board debug circuit, OSJTAG, provides a JTAG debug interface and a power supply input through a single USB mini-AB connector.