TWR-K20D72M User Manual
Contents
1. tnn paite pao eue nora o m nha pana saad ea ep rh paa na epa don 6 Figure 4 Infrared Port Implementation cscccccsssscececsssececssseeeeceeseeeeceesesaeeecsesneececsensecesseaeeeeseseneeees 9 List of Tables Table 1 Cortex Debug Connector 8 Table 2 TWRPI Socket Pin Co RE 10 Table 3 Touch TWRPI Pin Descripcion epa era Pero Rr DIR a PUn EAE etae Ya aa cusa sain cg ua 11 Table 4 TWR K20D72M Jumper Table 44 oceans eene enne nnno tenu snnt hann 12 Table 5 1 0 Connectors and Pin Usage 13 Table 6 TWR K20D72M Primary Connector 15 Revision History Revision Date Changes 0 1 March 15 2011 Initial Release TWR K20D72M User s Manual Page 3 of 17 2 freescale 1 TWR K20D72M Overview The K20D72M Tower MCU Module TWR K20D72M is a low cost evaluation demonstration and development board which features the Kinetis K20 72MHz low power microcontroller These devices are based on the ARM Cortex M4 architecture with USB 2 0 fu2. 9 2 6 D nc d Ger d D o Ec rc D a ba End a ra d d 9 2 7 External Bus Interface FlexBus esent ttt tnt tenente tante tates ttt ttt 9 2 8 eese sine a nri tait Rt a A A M AR M A EAE AR RAE 0E 9 2 9 Potentiometer Pushbuttons LEDS eene tnter trt trennt treat tette tates nsns annan annann 9 2 10 General Purpose Tower Plug in TWRPI Socket 10 2 11 Touch 10 2 12 Microphone 11 3 Jumper 2 2999P if 12 4 Input Output Connectors and Pin Usage Table eene 13 5 Elevator Connections rennen ERE ree na EE 15 TWR K20D72M User s Manual Page 2 of 17 D 2 freescale semiconductor List of Figures Figure 1 Front side of TWR K20D72M module iiie eene taa attenuata esa aman dan nao dera 4 Figure 2 Back side of TWR K20D72M mioodule rtr ione tue tuom run eau d ua Ligue eu ub ER 5 Figure 3 TWR K20D72M Block
3. 2 freescale semiconductor TWR K20D72M User Manual Rev 1 1 Freescale Semiconductor Inc e eo Contents 1 TWR K20D72M OvVervieW rere rne nnn 4 1 1 Feature Sinna a aa eaa 4 1 2 Getting started sunei E ta iq nu dise Plur End uri dv AA 5 1 3 Reference Documents eese tenent ttt tete tutatus setas seal 5 2 Hardware Description sesscenininieipiuiun dad uideri ud ent disk ced nsx n oic nC ERR KUNDE 5 2 1 K20D72M Microcontroller eene aiian 6 2 2 CVO CMG LIUM ME DLE E I MEE 7 2 Si SY SUCH 7 2 3 1 Board Power I A e 7 M ME 7 24 Debug Interface 8 DAD OSI EE 8 2 4 2 8 2 5 USB InterfdCe uico sexcenta ida Ug AERE RE RE FUR
4. TWR K20D72M User s Manual Page 11 of 17 e eo eo 25 freescale semiconductor 3 Jumper Table There are several jumpers provided for isolation configuration and feature selection Refer to the following table for details The default installed jumper settings are shown in bold with asterisks Table 4 TWR K20D72M Jumper Table Jumper Option Setting Description ON i n Connect PTD7 CMT IRO UARTO TX to IR Transmitter D1 OFF Disconnect PTD7 CMT IRO UARTO TX to IR Transmitter D1 ON Enable USB Power control IC U14 J2 Enable Micro USB Power OFF Disable USB Power control IC 014 ON Connect IRDA output to AD8 PTC7 CMPO IN1 J3 Infrared Receiver Connection OFF Disable IRDA output EBI AD8 PTC7 CMPO 1 1 ON Connection Microphone to ADC1 DPO J4 Microphone connection OFF Disable Microphone to ADC1 ON Connect on board VBRD for MCU power supply J6 MCU Power selection OFF Isolate MCU from power supply allows for external supply or power measurements ON Connect on board 5V supply to JTAG port supports powering J10 JTAG Power Connection board from external JTAG probe OFF Disconnect on board 5V supply from JTAG port 1 2 Connect VBAT to on board 3 3V supply J13 VBAT Power Selection 23 Connect VBAT to the higher voltage between on board 3 3V sup
5. The TWR K20D72M provides two methods for evaluating the TSI module There are two individual electrodes on board the TWR K20D72M that simulates pushbuttons Additionally twelve TSI signals TWR K20D72M User s Manual Page 10 of 17 77 freescale semiconductor are connected to a Touch Tower Plug in TWRPI socket that can accept Touch TWRPI daughter cards that may feature keypads rotary dials sliders etc The pinout for the Touch TWRPI socket is defined in Table 3 Refer to Table 5 I O Connectors and Pin Usage Table for the specific K20 pin connections to the Touch TWRPI socket Table 3 Touch TWRPI Pin Description Pin Description 1 5V VCC 2 3 3 V VCC 3 Electrode 0 4 3 3V VDDA 5 Electrode 1 6 VSS Analog GND 7 Electrode 2 8 Electrode 3 9 Electrode 4 10 Electrode 5 11 Electrode 6 12 Electrode 7 13 Electrode 8 14 Electrode 9 15 Electrode 10 16 Electrode 11 17 ADC TWRPI ID O 18 ADC TWRPI ID 1 19 GND 20 Reset 2 12 Microphone and buzzer TWR K20D72M board includes a microphone U16 which connects with one ADC channel to allow audio recording there is a low pass filter implemented before microphone input goes to ADC channel Jumper J4 can be used for connection with the ADC channel There is also a buzzer connected with one PWM output channel on FTM module jumper J21 is used for this connection
6. N TSI Electrodes JAG sa IS Ringgit 9 Connector TI e Board Power Selector Secondary Connector SW3 Reset Figure 1 Front side of TWR K20D72M module TWR K20D72M User s Manual Page 4 of 17 gt gt 25d 2 freescale semiconductor VBAT RTC Battery Holder Figure 2 Back side of TWR K20D72M module 1 2 Getting started Follow the Quick Start Guide found printed in the TWR K20D72M box or the interactive DVD for the list of recommended steps for getting started There are also lab walk through guides available on the tool support page for the TWR K20D72M http www freescale com TWR K20D72M 1 3 Reference Documents The documents listed below should be referenced for more information on the Kinetis family Tower System and the MCU modules These can be found in the documentation section of http www freescale com TWR K20D72M or http www freescale com kinetis TWR K20D72M Quick Start Guide TWR K20D72M Schematics K20 Family Product Brief K20 Family Reference Manual Kinetis Quick Reference User Guide KORUG 2 Hardware Description The TWR K20D72M is a Tower System module featuring the MK20DX256VLL7 an ARM Cortex M4 based microcontroller with USB 2 0 full speed OTG controllers a 1OOLQFP package with a maximum core operating frequency of 72MHz It is intended for use in the Freescale Tower System but can operate stand alone An on board
7. 2 DI 9 GNDDetect PTAA FTMO CH1 MS NMI b EZP CS b 10 nReset RESET b 11 Target Power 5V supply via J10 12 13 Target Power 5V supply via J10 14 15 GND GND 16 17 GND GND 18 19 GND GND 20 TWR K20D72M User s Manual Page 8 of 17 gt 77 freescale semiconductor Note there are no ETM signals on K20D72M so the associated signals on Cortex Debugger connector is left empty 2 5 USB Interface TWR K20D72M board allows using USB as host or device in standalone mode or with connection to TWR SER board in a complete tower kit Jumper J16 can be used to select which USB VBUS signal from USB connector to connect with the MCU VREGIN input pin When using in standalone mode short 5 6 on J16 and connect USB with on board Micro USB connector J19 when using with TWR SER board in complete tower kit short 6 8 on J16 and connect USB with Mini AB connector J14 on TWR SER board Refer to description on J16 Table 4 TWR K20D72M Jumper Table for more information 2 6 Infrared Port An infrared transmit and receive interface is implemented as shown in Figure 4 below The CMT IRO pin directly drives an infrared diode The receiver uses an infrared phototransistor connected to an on chip analog comparator through a low pass filter BRD R40 1 54K PTD7 CMT IRO gt PTD7 CMT IRDAJ 4_ RDA_SEN aS CMPO INO gt gt EBI ADB PTCTICMPO IN1 cae 50
8. 3 System Power In standalone operation the main power source for the TWR K20D72M is derived from the 5 0V input from either the USB mini B connector J14 or the debugger header J11 when a shunt is placed on jumper J10 On board low dropout regulator provides either 3 3V or 1 8V supply from the 5 0V input voltage based on jumper settings on J17 refer to sheet 5 of the TWR K20D72M schematic for details When installed into a Tower System the TWR K20D72M can be powered from either an on board source or from another source in the assembled Tower System If both the on board and off board sources are available the TWR K20D72M will default to the off board source The 3 3V or 1 8V power supplied to the MCU is routed through a jumper J6 The jumper shunt can be removed to allow for either 1 alternate MCU supply voltages to be injected or 2 the measurement of power consumed by the MCU 2 3 1 Board Power Select TWR K20D72M board include on board regulators for both 3 3V and 1 8V output and add jumper J17 to select which one to use as board power and CPU power This allows MCU operation under 1 8V power supply 2 3 2 RTC VBAT The real time clock RTC module on the K20D72M has two modes of operation system power up and system power down During system power down the RTC is powered from the backup power supply VBAT The TWR K20D72M provides a battery holder for a coin cell battery that can be used as the TWR K20D72M User s Manual Page 7
9. TMR5 B61 IRQ B PTC6 A61 TMR4 B62 IRQ A PTC5 A62 RSTIN b RESET b B63 ALE EBI 51 b PTDO A63 RSTOUT b PTE1 B64 EBI_CS0_b PTD1 A64 CLKOUTO PTC3 B65 GND Ground A65 GND Ground B66 AD15 PTB18 A66 EBI AD14 PTCO B67 EBI AD16 PTB17 A67 EB AD13 1 B68 AD17 PTB16 A68 EBI AD12 PTC2 B69 AD18 PTB11 A69 EBI AD11 PTC4 B70 EBI_AD19 PTB10 A70 EBI AD10 PTC5 B71 EBI R W b 11 71 EBI_AD9 PTC6 B72 EBI OE b PTB19 72 AD8 7 B73 EBI D7 PTC8 A73 AD7 LATCH AD7 B74 EBI D6 9 74 AD6 LATCH B75 EBI D5 PTC10 75 AD5 LATCH 05 B76 EBI 04 PTD2 A76 EBI AD4 LATCH AD4 B77 EBI D3 PTD3 AT1 EBI_AD3 LATCH_ AD3 B78 EBI D2 4 78 EB AD2 LATCH AD2 B79 EBI D1 PTD5 79 EBI AD1 LATCH AD1 B80 EBI DO PTD6 A80 EBI ADO LATCH_ ADO B81 GND Ground A81 GND Ground B82 3 3V 3 3V Power A82 3 3V 3 3V Power TWR K20D72M User s Manual Page 16 of 17 e 22 freescale semiconductor freescale ictor Freescale and the Freescale logo are trademarks of Freescale Semiconductor Inc All other product or service names are the property of their respective owners Freescale Semiconductor Inc 2011 All rights reserved TWR K20D72M User s Manual Page 17 of 17
10. WU IDR 1X2 TH Q1 3 bi 4 PT12 21C TRB R38 IRDAR Di IR12 21C TR8 c2 0 1uF InfraRed H t 33 Figure 4 Infrared Port Implementation 2 7 External Bus Interface FlexBus The K20 device features a multi function external bus interface called the FlexBus interface controller capable of interfacing to slave only devices The FlexBus interface is not used directly on the TWR K20D72M Instead a subset of the FlexBus is connected to the Primary Connector so that the external bus can access devices on Tower peripheral modules Refer to Table 6 TWR K20D72M Primary Connector Pinout and sheet 8 of the TWR K20D72M schematics for more details 2 8 Accelerometer MMA8451Q digital accelerometer is connected to the K20 MCU through an I2C interface and a GPIO IRQ signal Refer to Table 5 Connectors and Pin Usage Table for connection details 2 9 Potentiometer Pushbuttons LEDs The TWR K20D72M features two pushbutton switches connected to GPIO interrupt signals one pushbutton connected to the master reset signal two capacitive touch pad electrodes four user TWR K20D72M User s Manual Page 9 of 17 77 freescale semiconductor eo ao 25 controllable LEDs and a potentiometer connected to ADC input signal Refer to Table 5 I O Connectors and Pin Usage Table for information about which port pins is connected to these features 2 10 General
11. card edge connectors that interface to Elevator boards in a Tower System the Primary and Secondary Elevator connectors The Primary Elevator connector comprised of sides A and B is utilized by the TWR K20D72M while the Secondary Elevator connector only makes connections to ground GND Table 6 provides the pinout for the Primary Elevator Connector Table 6 TWR K20D72M Primary Connector Pinout Pin 5 Pin Side A Usage NEME Usage B1 5V 5 0V Power Al 5V 5 0V Power B2 GND Ground A2 GND Ground B3 3 3V 3 3V Power A3 3 3V 3 3V Power B4 ELE PS SENSE Elevator Power Sense A4 3 3V 3 3V Power B5 GND Ground A5 GND Ground B6 GND Ground A6 GND Ground B7 SDHC SPI1 2 7 SCLO PTB2 B8 SDHC D3 SPI1 CS1 b A8 SDAO PTB3 B9 SDHC 03 5 1 CSO b PTE4 A9 GPIO9 CTS1 PTC9 B10 SDHC CMD 5 1 MOSI PTE1 A10 GPIO8 SDHC 02 PTB22 B11 SDHC D0 SPI1 MISO PTE3 11 GPIO7 SD WP DET PTB21 B12 ETH COL A12 ETH CRS B13 ETH RXER A13 ETH MDC 14 ETH TXCLK A14 ETH MDIO B15 ETH TXEN A15 ETH RXCLK B16 ETH TXER A16 RXDV B17 ETH TXD3 A17 ETH RXD3 B18 ETH TXD2 A18 ETH RXD2 B19 ETH TXD1 A19 ETH RXD1 B20 ETH TXDO A20 ETH RXDO B21 GPIO1 RTS1 PTC7 A21 551 MCLK PTC8 B22 GPIO2 SDHC D1 PTEO A22 551 BCLK PTB18 B23 20 23 SSI FS PTB19 B24 CLKI NO A24 551 RXD PTC11
12. debug circuit OSJTAG provides a JTAG debug interface and a power supply input through a single USB mini AB connector Figure 3 shows a block diagram for the TWR K20D72M The following sections describe the hardware in more detail TWR K20D72M User s Manual Page 5 of 17 gt 2 lt 77 freescale Tower Elevator Expansion Connectors S SPI USB ADC DAC UARTs Flexbus 20 Pin 5V USB Mini AB is VBAT RTC 8 MHz XTAL f 32 768 KHz XTAL IR Output Comparator GPIO Interrupts 1 8V 3 3 Regulator Regulator Infrared Port Reset B Battery holder gt FTM SPI PC ADC GPIO lt TSI GPIO Tower Plug in TWRPI Sensor Socket General purpose Tower Plug in TWRPI Capacitive Pads ADC Microphone amplifier p Freescale Silicon EE External Connectors Interface Circuits BH Power Figure 3 TWR K20D72M Block Diagram 2 1 K20D72M Microcontroller The TWR K20D72M module features the MK20DX256VLL7 The Kinetis K20 microcontroller family is part of the Kinetis portfolio of devices built around an ARM Cortex M4 core Refer to the K20 Family Product Brief and the K20 Family Reference Manual for comprehensive information on the MK20DX256VLL7 device MK20DX256VLL7key features 1 71V 3 6V operating voltage External bus interface Power managemen
13. of 17 77 freescale semiconductor VBAT supply The holder can accept common 20mm diameter 3V lithium coin cell batteries e g 2032 2025 Refer to the description J13 in Table 4 TWR K20D72M Jumper Table for more information 2 4 Debug Interface There are two debug interface options provided the on board OSJTAG circuit and an external Cortex Debug connector 2 4 1 OSJTAG An on board MC9S08JM60 based Open Source BDM OSBDM circuit provides a debug interface to the K20D72M A standard USB A male to Mini B male cable provided can be used for debugging via the USB connector J14 The OSJTAG interface also provides a USB to serial bridge Drivers for the OSJTAG interface are provided in the P amp E Micro Kinetis Tower Toolkit available on the included DVD 2 4 2 Cortex Debug Connector The Cortex Debug connector is a 20 pin 0 05 connector providing access to the SWD SWV JTAG CJTAG EzPort signals available on the K20 device The pinout and K20 pin connections to the debug connector J11 is shown in Table 1 Table 1 Cortex Debug Connector Pinout Pin Function TWR K20D72M connection 1 VTref MCU supply MCU PWR 2 TMS SWDIO PTA3 UARTO RTS b FTMO CHO JTAG MS SWD DIO 3 GND GND 4 TCK SWCLK PTAO UARTO CTS b FTMO CH5 JTAG CLK SWD CLK EZP CLK 5 GND GND 6 TDO SWO PTA2 UARTO TX FTMO CH7 JTAG DO TRACE SWO EZP DO 7 Key 8 TDI PTAT1 UARTO TX FTMO CH6 JTAG
14. B25 CLKOUT1 PTE26 A25 551 B26 GND Ground A26 GND Ground B27 AN7 PTBO A27 AN3 ADCO B28 AN6 PTB1 A28 AN2 ADCO_DMO B29 AN5 PTB2 A29 1 ADC1 B30 AN4 PTB3 A30 ANO B31 GND Ground A31 GND Ground B32 DAC1 A32 DACO DACO_OUT B33 TMR3 A33 TMR1 PTA13 B34 TMR2 PTD7 A34 TMRO PTA12 B35 GPI O4 14 5 GPIO6 PTA15 B36 3 3V 3 3V Power A36 3 3V 3 3V Power B37 PWM7 A37 PWM3 PTCA B38 PWM6 PTD6 A38 PWM2 PTC3 B39 PWM5 PTD5 A39 PWM1 PTC2 B40 PWM4 PTD4 A40 PWMO PTC1 B41 CANRXO PTA13 41 RXDO PTD6 TWR K20D72M User s Manual Page 15 of 17 22 gt 25d 2 freescale semiconductor Side B Pin Side A Name Usage Name Usage B42 CANTXO PTA12 A42 TXDO PTD7 B43 1WIRE A43 RXD1 PTE1 B44 SPIO MISO PTD3 A44 TXD1 PTEO B45 SPIO PTD2 A45 55 VSSA 46 SPIO 50 b PTDO A46 VDDA VDDA 47 SPIO 51 b PTD4 A47 VREFA1 48 5 10 1 48 VREFA2 B49 GND Ground A49 GND Ground B50 SCL1 PTB2 A50 GPIO14 PTC12 B51 SDA1 PTB3 A51 GPI O15 PTC13 B52 GPIO5 SPIO HOLD IO3 10 A52 GPI O16 PTC14 B53 USBO DP PDOWN A53 GPI O17 PTC15 B54 USBO DM PDOWN A54 USBO_DM USBO_DN B55 IRQ H PTE25 55 USBO DP USBO DP B56 IRQ PTE24 56 USBO ID B57 IRQ F PTE6 A57 USBO_VBUS USBO_VBUS B58 IRQ E PTE5 A58 TMR7 B59 IRQ D PTA17 A59 TMR6 B60 IRQ C PTA16 A60
15. ON SDA to ACCELEROMETER J26 Enable SDA to ACCELEROMETER OFF Disable SDA to ACCELEROMETER ON Enable POTENTIOMETER to 1 J27 Enable POTENTIOMETER OFF Disable POTENTIOMETER to 1 4 Input Output Connectors and Pin Usage Table Table 5 provides details on which K20D72M pins are using to communicate with the TWR K20D72M sensors LEDs switches and other 1 0 interfaces Note Some port pins are used in multiple interfaces on board and many are potentially connected to off board resources via the Primary and Secondary Connectors Take care to avoid attempted simultaneous usage of mutually exclusive features Table 5 I O Connectors and Pin Usage Table Feature Infrared Port R transmit IR Receive SW1 IRQ0 Pushbuttons SW2 IRQ1 nection SW3 RESET Touch Pads Touch D2 Orange LED D3 Yellow LED D4 YEL GRN LED LEDs D5 Yellow LED D7 Green LED D8 Blue LED D9 D10 Potentiometer Microphone BUZZER BUZZER Potentiometer R42 Microphone Port Pin Pin Function PTD7 CMT IRO PTC7 CMPO IN1 1 1 2 PTC2 RESET b RESET b PTBO TSIO CHO PTB1 150 CH6 PTCA RESET b 3 3V Power on PTD1 OSBDM status PTDO OSBDM target power PTC7 Green LED PTC8 Blue LED PTC9 D9 Electrode LED PTC10 D10 Electrode LED ADC1 DMO ADC1 PTCA CH3 TWR K20D72M User s Manual Page 13 of 17
16. Purpose Tower Plug in TWRPI Socket The TWR K20D72M features a socket that can accept a variety of different Tower Plug in modules featuring sensors RF transceivers and more The General Purpose TWRPI socket provides access to 2 SPI IRQs GPIOs timers analog conversion signals TWRPI ID signals reset and voltage supplies The pinout for the TWRPI Socket is defined in Table 2 Table 2 TWRPI Socket Pin Description Left side 2x10 Connector Right side 2x10 Connector Pin Description Pin Description 1 5V 1 GND 2 3 3 V VCC 2 GND 3 GND 3 2 SCL 4 3 3V VDDA 4 12 SDA 5 VSS Analog GND 5 GND 6 VSS Analog GND 6 GND 7 VSS Analog GND 7 GND 8 ADC Analog 0 8 GND 9 ADC Analog 1 9 SPI MISO 10 VSS Analog GND 10 SPI MOSI 11 VSS Analog GND 11 SPI SS 12 ADC Analog 2 12 SPI CLK 13 VSS Analog GND 13 GND 14 VSS Analog GND 14 GND 15 GND 15 GPIO GPIOO IRQ 16 GND 16 GPIO GPIO1 IRQ 17 ADC TWRPI ID 0 17 GPIO GPIO2 UARTO RX 18 ADC TWRPI ID 1 18 GPIO GPIO3 UARTO TX 19 GND 19 GPIO GPIO4 UARTO CTS 20 Reset 20 GPIO GPIO5 UARTO RTS 2 11 Touch Interface The touch sensing input TSI module of the Kinetis MCUs provides capacitive touch sensing detection with high sensitivity and enhanced robustness Each TSI pin implements the capacitive measurement of an electrode
17. e gt gt 2 freescale semiconductor Accelerometer General Purpose TWRPI Socket Touch Pad TWRPI Socket I2C SDA 2 SCL IRQ1 IRQ2 TWRPI ANO J7 Pin 8 TWRPI 1 J7 Pin 9 TWRPI AN2 J7 Pin 12 TWRPI IDO J7 Pin 17 TWRPI ID1 17 Pin 18 TWRPI I2C SCL J8 Pin 3 TWRPI I2C SDA 18 Pin 4 TWRPI SPI MISO J8 Pin 9 TWRPI SPI MOSI J8 Pin 10 TWRPI SPI SS J8 Pin 11 TWRPI SPI CLK J8 Pin 12 TWRPI GPIOO J8 Pin 15 TWRPI GPIO1 J8 Pin 16 TWRPI GPIO2 J8 Pin 17 TWRPI GPIO3 18 Pin 18 TWRPI 04 J8 Pin 19 TWRPI GPIO5 J8 Pin 20 Electrode O J5 Pin 3 Electrode 1 15 Pin 5 Electrode 2 J5 Pin 7 Electrode 3 J5 Pin 8 Electrode 4 J5 Pin 9 Electrode 5 J5 Pin 10 Electrode 6 J5 Pin 11 Electrode 7 J5 Pin 12 Electrode 8 J5 Pin 13 Electrode 9 J5 Pin 14 Electrode 10 J5 Pin 15 Electrode 11 J5 Pin 16 TWRPI IDO J5 Pin 17 TWRPI ID1 J5 Pin 18 PTB3 PTB2 PTBO PTB1 PTBO PTB1 2 0 SDA 2 0 SCL PTBO PTB1 ADCO_SE8 ADCO SE9 1 DPO ADCO DPO ADCO DMO 2 0 SCL 2 0 SDA SPIO SIN SPIO SOUT SPIO PCS1 SPIO SCK PTC5 PTC6 UARTO_RX UARTO_TX UARTO_CTS UARTO_RTS TSIO_CHO TSIO_CH6 TSIO_CH7 TSIO_CH8 TSIO_CH13 TSIO_CH14 TSIO_CH15 TSIO 5 TSIO 9 TSIO CH10 TSIO CH11 150 CH12 ADCO DPO ADCO DMO TWR K20D72M User s Manual Page 14 of 17 77 freescale semiconductor 5 Elevator Connections The TWR K20D72M features two expansion
18. ll speed OTG controller The TWR K20D72M microcontroller module can operate in stand alone mode or as part of the Freescale Tower System a modular development platform that enables rapid prototyping and tool re use through reconfigurable hardware Take your design to the next level and begin constructing your Tower System today by visiting www freescale com tower for additional Tower System microcontroller modules and compatible peripherals 1 1 Features The following list summarizes the features of the K20D72M Tower MCU boards e Tower compatible processor board S08JM60 based Open Source BDM OSBDM circuit e Four 4 user controlled status LEDs e Two 2 Capacitive Touch Pads and two 2 mechanical push buttons e Socket for Capacitive Touch Pad daughter board Touch TWRPI Socket for Tower Plug in TWRPI e g sensor board e Standalone USB host and device function e Microphone and buzzer e Potentiometer MMA8451Q three axis accelerometer e Battery holder for 20mm lithium battery e g 2032 2025 e Board power select with 3 3V or 1 8V MCU operation Primary __ General Purpose Connector _ Touch Plug In Socket TWRPI Infra Red n NEG E EE _ Y T 5 oem Potentiometer MicroUSB 6 ato Microphone 5908 nens Power OSJTAG Touch TWRPI MiniB USB r 8 D Socket Connector lt oo Nis EH
19. ply or coin cell supply ON OSJTAG bootloader mode OSJTAG firmware reprogramming J15 OSJTAG Mode Selection OFF Debugger mode 1 2 5V Power from OSBDM USB powers LDO regulator 5 VBUS signal on Micro USB connector J19 connects to J16 Power 5V and VREG IN Selection VREGIN to allow standalone USB operation 6 8 VBUS signal from elevator connector connects to VREGIN to allow USB operation with complete tower kit 1 2 Board power from VOUT 3V3 J17 Board power selection 3 5 Board power from 3 3V regulator 5 7 Board power from 1 8V regulator 5 ON Connect USB 3 3V regulator output to J18 3 3V VOUT Selection OFF Disconnect USB 3 3V regulator output to MCU PWR ON Connect over current signal on USB power IC MIC 2026 to 20 USB power IC over current signal connection OFF Disconnect over current signal on USB power IC MIC 2026 to PTC8 ON Enable buzzer to EBI AD11 FTMO J21 Enable Buzzer OFF Disable buzzer to AD11 FTMO CH3 TWR K20D72M User s Manual Page 12 of 17 gt 22 gt 25d freescale semiconductor ON Enable IRQ2 to ACCELEROMETER J23 Enable IRQ2 to ACCELEROMETER OFF Disable IRQ2 to ACCELEROMETER J24 Enable IRQ1 to ACCELEROMETER Enab e IROI to ACCELEROMETER OFF Disable IRQ1 to ACCELEROMETER ON J25 Enable SCL to ACCELEROMETER SN Enable LL tO ACCELEROMETER OFF Disable SCL to ACCELEROMETER
20. t controller Multi purpose clock generator 16 bit SAR ADC 12 bit DAC 32 bit ARM Cortex M4 core with DSP instructions 72MHz maximum core operating frequency 100LQFP 14mm x 14mm 0 5mm pitch package input range 256 Kbytes of program flash 64 Kbytes of static RAM with 10 different power modes with PLL and FLL operation modes High speed analog comparator with 6 bit DAC Tower Plug in TWRPI Touch TWR K20D72M User s Manual Page 6 of 17 gt 77 freescale semiconductor e Programmable voltage reference USB full speed low speed OTG Host Device controller with device charge detect e SPI w SMBUS support UART w 1507816 and IrDA CAN 175 GPIO with pin interrupt support DMA request capability digital glitch filtering Capacitive touch sensing inputs TSI e Debug interfaces JTAG SWD e Trace TPIO FPB DWT ITM 2 2 Clocking The Kinetis MCUs start up from an internal digitally controlled oscillator DCO Software can enable one or two external oscillators if desired The external oscillator for the multipurpose clock generator MCG module can range from 32 768 KHz up to a 32 MHz crystal or ceramic resonator The external oscillator for the real time clock RTC module accepts a 32 768 kHz crystal Two crystals are provided on board for clocking the K20D72M device 8 MHz crystal as main oscillator to clock MCG module and 32 768 kHz crystal for clocking RTC module 2
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