Taking the Lead in Low Power
Contents
1. DEMO9S08QE8 4 Lab Tutorials AccelerometerDemo running on MC9S08QE8 in data averaging mode Bar graph C highlights the bus cycles required to average the last 16 readings of the 3 axes The value in the 4th column in the terminal window is the number of bus cycles in hex Taking the Lead in Low Power Learn How to Use DEMOQE Toolkit Utilities This lab will show you how to use one of several graphical utilities in the DEMOQE Toolkit included with your board Instructions to download these utilities to your computer are provided in Step 2 of the Quick Start Guide DEMOSO8QE8QSG pdf Running the Quick Start Application that came pre loaded in the microcontroller s on chip flash memory we will now use the DEMOQE Logic Analyzer utility This PC based utility graphs the INO and IN1 signals on the board For convenience if both J11 jumpers are installed INO graphs PTCO activity and IN1 graphs PTC1 activity To graph other microcontroller signals use wire jumpers from INO and IN1 to the respective signals on the board s MCU PORT 1 Make sure that the Quick Start Application is running 2 Launch DEMOQE Logic Analyzer utility from the start menu Programs gt P amp E DemoQE Toolkit gt Utilities gt Logic Analyzer Utility See DEMO9SO8QE8 User Manual for details on the Logic Analyzer Utility 3 In utility click on the Open DEMOQE and Graph Pins button to begin graphing INO and IN1 These signals w2. 1 amp 2 384 788 PTA2 KBI1P2 SDA1 ADP2 9 10 VREFH PTC4 TPM3CH4 RSTO 37 38 PTC7 TxD2 ACMP2 J6 2 amp 3 J17 182 3 amp 4 PTA3 KBI1P3 SCL1 ADP3 11 12 VREFL PTC5 TPM3CHS ACMPO 39 40 PTC6 RxD2 ACMP2 J7 2 amp 3 J18 182 3 amp 4 PTCO TPM3CHO 13 14 PTAO KBI1P0 TPM1CHO ADPO ACMP1 n c for 32 LQFP PTF2 ADP12 41 42 PTB7 SCL1 EXTAL J8 283 J19 182 PTC1 TPM3CH1 15 16 PTA1 KBI1P1 TPM2CHO ADP1 ACMP1 n c for 32 LQFP PTF3 ADP13 43 44 PTBG SDA1 XTAL J9 e n Hee on 0 J20 182 384 PTB3 KBHP7 MOSI ADP7 17 18 PTFO ADP10 n c for 32 LQFP n c for 32 LQFP PTF4 ADP14 45 46 PTGO n c for 32 LQFP Fe T a J21 182 384 PTB4 TPM2CH1 MISO1 19 20 PTFI ADP11 n c for 32 LQFP n c for 32 LQFP PTF5 ADP15 47 48 PIGI n c for 32 LOFP T TEE J24 182 PTB2 KBI1P6 SPSCK1 ADP6 21 22 PTA6 TPM1CH2 ADP8 n c for 32 LQFP PTF6 ADP16 49 50 PTHO n c for 32 LQFP on ae PTB5 TPMICH1 SS1 23 24 PTA7 TPM2CH2 ADP9 n c for 32 LOFP PTF7 ADP17 51 52 PTH n c for 32 LOFP PTD1 KBI2P1 MOSI2 25 26 PTH6 SCL2 n c for 32 LQFP PTD2 KBI2P2 MISO2 27 28 PTH SDA2 n c for 32 LQFP n c for 32 LOQFP n c for 32 LQFP PTG2 ADP18 53 54 PTE6 n c for 32 LQFP PTGS ADP19 7 55 56 NC S
3. position 8 Board jumpers should all be set to the default settings shown in Quick Start Guide 9 Turn board power switch to ON position and close debugger window 10 i Compile and program the MC9S08QE8 with Low Power application by clicking on Debug button launching Debugger 11 From Connection Manager menu select DEMOQE on USB1 port and click on Connect Reset 12 From Erase and Program Flash menu click on Yes to allow the debugger to mass erase the microcontroller s on chip flash memory and program it with the new application 13 For the application to run correctly the MCU cannot be in debug mode Therefore close the Debugger window Turn N the board power switch OFF then ON to power cycle the MCU The MCU is now running the Low Power application 14 Bring Terminal Utility to front and click the Open Serial Port button 15 Observe output in Terminal Utility Count should increase by 5 every 5 seconds 16 Press and hold button labeled PTA3 on board to enter LPRun mode until mode change is reflected in terminal window The terminal time updates will cease but the PTCO LED will continue to blink Wait 5 or more seconds 17 Press and hold button labeled PTA2 on board to enter normal run mode until mode change is reflected in terminal window The terminal time updates will resume with accurate total count 18 Press and hold button labeled PTD2 on board to ent
4. and program the MC9S08QE8 with the Application by clicking on Debug button launching Debugger 11 From Connection Manager menu select DEMOQE on USB1 port and click on Connect Reset 12 From Erase and Program Flash menu click on Yes to allow the debugger to mass erase the microcontrollers on chip flash memory and program it with the new application 13 Click on the Start Continue F5 button in debugger to run application 14 Bring Accelerometer Demo utility to front and click the Open Serial Port and Start Demo button 15 Move board around to demonstrate 3 axis accelerometer 16 Observe output of raw data in Accelerometer Demo utility The data is displayed in hexadecimal format in the Terminal Window and in graphical form in the bar graph and Scope windows The fourth value is the number of bus cycles for the CPU to process the data 17 Click button labeled PTA3 on board to enable data averaging Move board 18 Click button labeled PTA2 on board to enable data filtering Move board 19 Click on Close Port button and close Terminal Utility when finished N o z freescale semiconductor DEMO9S08QE8 4 Lab Tutorials DEMO9S08QE8 4 Lab Tutorials Switch LEDs External Push Buttons Power Connector Speaker Potentiometer Pemicro Embedded oa USB peosnsOEa aed Daughter Card RS232 Connector Accelerometer Figure 1 DEMOQE basebo
5. ard with MC9SO8QE8 8 bit daughter card The DC9SO8QE8 daughter card can be used on the DEMOQE128 kit Learn More For more information about Freescale products please visit www freescale com lowpower a m Freescale and the Freescale logo are trademarks or registered trademarks of Freescale a e Semiconductor Inc in the U S and other countries All other product or service names are the ey onductor property of their respective owners Freescale Semiconductor Inc 2008 oe O f TM Doc Number QE8QE4LABSSHEET REV 1 e reesca e Agile Number 926 22168 REV B semiconductor MCU Port Connector Pinout Default Jumper Settings The following is the pinout for the MCU port connector on the DEMOQE board No connects n c for 32LQFP apply to DC9S08QE8 daughter card The following is a list of default jumper settings for DEMOQE board The settings listed indicate the on or installed position VDD 1 2 PTA5 IRQ TPM1CLK RESET PTDO KBI2PO SPSCK2 29 30 PTD4 KBI2P4 n c for 32 LQFP Installed Settings Ves 8 4 PTA5 IRQ TPM1CLK RESET PTD3 KBI2P3 SS2 31 32 PTD5 KBI2P5 n c for 32 LQFP J3 283 J14 283 PTB1 KBI1P5 TxD1 ADP5 5 6 PTA4 ACMP10 BKGD MS PTC2 TPM3CH2 33 34 PTD6 KBI2P6 n c for 32 LQFP J4 384 J15 283 PTBO KBI1P4 RxD1 ADP4 7 8 PTEZ TPM3CLK n c for 32 LQFP PTC3 TPM3CH3 35 36 PTD7 KBI2P7 n c for 32 LQFP J 182 J16
6. er data on the microcontroller s serial communication interface Pressing the PTAS switch outputs a rolling average of the raw accelerometer data and pressing the PTA2 switch outputs a filtered version of the raw accelerometer data For this lab to operate correctly the IIC pullup jumpers J20 must be removed Solutions sOtknized for low Dower Setup demo 1 Open CodeWarrior for Microcontrollers From Windows start menu you can locate it using the Programs gt Freescale CodeWarrior gt CW for Microcontroller V6 x gt CodeWarrior IDE exe path 2 Click on Load Example Project from CodeWarrior startup dialog 3 From example projects menu open tree to select HCS08 gt Evaluation Board Examples gt DEMO9S08QE8 gt DEMO9SO8QE8_ Accelerometer_Ex 4 Create a new project name ex Lab3 set desired location and click Create Project This will open the project for the Accelerometer Application for the MC9SO8QE8 microcontroller 5 Launch Accelerometer Demo utility from the start menu Programs gt P amp E DemoQE Toolkit gt Utilities gt Accelerometer Demo See DEMO9SO08QE8 User Manual for details on the Accelerometer Demo utility 6 Set port to USB COM and baud rate to 9600 Turn board power switch to OFF position 8 Board jumpers should all be set to the default settings shown in Quick Start Guide 9 Turn board power switch to ON position and close debugger window 10 i Compile
7. er stop3 mode until mode change is reflected in terminal window The MCU will wake from stop3 mode every 5 seconds and update the total count 19 Press and hold button labeled PTD3 on board to enter stop2 mode until mode change is reflected in terminal window The MCU will wake from stop2 mode every 5 seconds and update the total count 20 To exit from the stop2 mode hold one of the other buttons down until the terminal window shows a change of mode This may take up to 5 seconds 21 Click the button labeled RESET to toggle the clock gates open and shut When the gates are shut the normal run mode current will be noticeably lower You should not see a significant difference in the other modes The RESET button should not be used when the DEMO is in stop2 mode 22 Click on Close Port button and close Terminal Utility when finished Measure Performance of the MC9SO08QE8 with Accelerometer Demo This lab will highlight the performance capability of the MC9S08QE8 microcontroller It will also detail how to use another one of several software utilities included with your board to help you in your development Instructions to download these utilities to your computer were provided in Step 2 of the Quick Start Guide The accelerometer application reads the X Y and Z axes of the 3 axis accelerometer on the DEMOQE board using the microcontrollers A D converter After any reset it outputs the raw values of the acceleromet
8. ill be continually graphed at a sampling rate of 10 kHz 4 Click button labeled PTA2 This will cause a fixed duty cycle pulse width modulation signal to be output on the PTCO pin The PTCO waveform is shown on analyzer channel INO 5 Rotate the potentiometer W1 This will change the duty cycle of the variable pulse width modulation signal output on the PTC1 pin The PTC1 waveform is shown on analyzer channel IN1 6 Click on Close Port button when finished For more information on DEMOQE Toolkit read the board user manual DEMO9SO8QE8UM pdf included on DVD under DEMO9S08QE8 gt DEMO9S08QE8 User Manual For new and upgraded utilities to the DEMOQE Toolkit visit www pemicro com fixedlinks demoQEtoolkit html Using the Low Power Modes This lab will demonstrate usage of three of the MC9S08QE8 s low power modes LPRun stop2 and stop3 The lab uses the Terminal Window application from the DEMOQE Toolkit Utilities to display the elapsed time since the program started in hours minutes seconds The software has four modes of operation 1 normal run mode 2 low power run mode LPRun 3 stop3 with the external oscillator running 4 stop2 with the external oscillator running The different modes are selected with the switches on the DEMOQE board The display will update every 5 seconds with the elapsed time since the last reset In the LPRun mode the display is not updated but the total count is continuo
9. usly updated In addition pressing the RESET button will toggle the clock gating open and shut The MCU current can be measured in the different modes by replacing the shunt on jumper J24 labeled on the bottom of the DEMOQE board with a current meter Lowest power consumption is achieved by removing jumpers from accelerometer J13 J16 potentiometer J21 and LED circuitry J9 For this lab to operate correctly the IIC pullup jumpers J20 must be removed 1 Open CodeWarrior for Microcontrollers From Windows start menu you can locate it using the Programs gt Freescale CodeWarrior gt CW for Microcontroller V6 x gt CodeWarrior IDE exe path 2 Click on Load Example Project from CodeWarrior startup dialog If the startup dialog is not shown it may be opened from the CodeWarrior menu by clicking File and then Startup Dialog 3 From example projects menu open tree to select HCS08 gt Evaluation Board Examples gt DEMO9S08QE8 gt DEMO9SO08QE8_Low_Power 4 Create a new project name ex Lab2 set desired location and click Create Project This will open the project for the Low Power application for the DEMO9SO8QE8 5 Launch Terminal Utility from the start menu Programs gt P amp E DemoQE Toolkit gt Utilities gt Terminal Utility See DEMO9SO08QE8 User Manual for details on the Terminal Utility 6 Set port to USB COM and baud rate to 9600 Turn board power switch to OFF
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