AVR ICE 200 User Guide
Contents
1. Symbol Min Max Voc 2 7V 5 5V AVcc Vec Voc 0 3V AGND GND GND AREF AGND AVcc Va Signal Input Voltage 0 5V Voc 0 5V Vreset RESET pin input Voltage GND Voc Note When Vec lt 2 4V the AVR emulator chip is reset and the program memory disconnected The ICE 200 does not support 12V RESET pin voltage that is used for parallel programming 4 1 Using the ICE 200 4 3 Clock Driver AVR microcontrollers are fully static designs The processor clock can be stopped exter Requirements nally The AVR emulator chip needs a clock to communicate with the main board Without a clock source the host PC gets a serial communication time out when reading status or variables from the emulator Please refer to the datasheet for information about clock oscillator options Table 4 2 Recommended Operating Conditions Clock Drive 4 0V to 5 5V TA 0 C to 70 C Voc 4 0V to 5 5V GND OV Symbol Min Max foso ATtiny 12 32 768 kHz 8 MHz fosc AT90S2313 32 768 kHz 10 MHz fosc AT90S 4433 2333 32 768 kHz 10 MHZ foso AT90S85 15 4414 32 768 kHz 8 MHz fosc AT90S8535 4434 32 768 kHz 8 MHz Table 4 3 Recommended Operating Conditions Clock Drive Low voltage 2 7V to 4 0V Ta 0 C to 70 C Vec 2 7V to 4 0V GND OV Symbol Min Max fose ATtiny 12 32 768 kHz 4 MHz fose AT90S2313 32 768 kHz 4 MHz fosc AT90S 4433 2333 32 768 kHz2. AIMEL AVR ICE 200 User Guide 4 8 1 4 9 4 9 1 4 9 2 4 9 3 Checklist Emulator Options Settings Device Settings Clock Selection Settings Single step Timers Setting AVR ICE 200 User Guide Using the ICE 200 For advanced users Section 4 9 describes in more detail the possible settings in the Options menu The software is now ready for use Use the checklist below to ensure that the setup was done correctly The ICE 200 is now ready for debugging Tip If AVR Studio cannot connect to the emulator make sure no other programs are using the serial port 1 O The personality adapter selected corresponds to the device that is to be used 2 O Target application is correctly connected to the emulator as described in previous section 3 O AVR Studio detects that the emulator is present when opening the application code 4 O The Options menu for ICE 200 was shown when opening the source file only first time 5 O The device in the Options menu correspond to the chip configuration you want to use 6 O The text AVR Emulator appears in the status bar of AVR Studio found in the lower right corner of the window Some devices have identical pinout and functionality An example is the AT90S8515 and the AT90S4414 devices there is no need for a personality adapter for each of them The automatic personality adapter detection ensures correct pinout configuration of the AVR emulator chip When select
3. Adapter Settings 4 5 ting of the resistors is shown in Figure 4 6 The resistor setting depends on the desired clock configuration Select the resistor setting based on the table below Default factory resistor setting is internal RC oscillator Figure 4 6 Settings of Resistors on ATadap3400 The AVR ATtiny12 microcontroller includes some special oscillator pin features that could not be implemented in the AVR emulator chip due to its multiple device support However the options are supported on the personality adapter by changing the position of two zero ohm resistors that configure the port and the oscillator pin mapping The set System Clock System a System I System Clock Clock Clock ne gt tcl XTAL1 XTAL2 y XTALI PB4 XTAL1 PB4 PB3 PB4 CC O vO VO vO Outgide De ice T T External 1 r External RC External Internal RC u Crystal ar Oscillator Clock Sour Oscillator Resonator scillato ock Source scillato Resistor PB3 ODXTAL Pese CD xTai Peaje CDIXTAL Pl lxTaL Settin Page olxa Peg xTaL2 PB4 gD xTAL2 PB4 D XTAL2 The personality adapter board has four additional resistors These are used as identifi cation codes for the automatic configuration and for production test purposes Do not remove these resistors 4 6 AIMEL AVR ICE 200 User Guide 4 6 Connecting to the Target Application AVR ICE 200
4. However novice users should also check that the operating conditions of the target system are compliant to the requirements of ICE 200 This is described in the Using the ICE 200 section The Atmel CD ROM contains various documentation relating to the use of AVR micro controllers and of the debugging tools including AVR Studio User Guide AVR Assembler User Guide and complete microcontroller datasheets 1 1 Rev 1413A 06 23 99 Preface Read this First 1 2 AIMEL AVR ICE 200 User Guide AIMEL AVR ICE 200 User Guide Section 2 Introduction The ICE 200 in circuit emulator provides an easy way of debugging embedded systems that utilizes the Atmel AVR microcontroller It emulates 11 different devices of the AVR and the Tiny AVR families The philosophy of the ICE 200 is to provide an easy to use debugging platform with a minimum of differences between the emulator and the actual processor it is emulating The AVR emulator chip used by the ICE 200 is produced in the same process technol ogy as the microcontroller it is emulating This provides identical electrical characteristics On board debugging resources ensure non intrusive software emula tion The ICE 200 hardware also includes an automatic configuration system that makes the process of connecting the target to the emulator an easy task Figure 2 1 The ICE 200 Components When used with the AVR Studio debugging environment the ICE 200 gives the user full run
5. 4 9 5 4 9 6 4 12 EEPROM Restore Setting Communication Speed Setting Reset Pin Setting ATtiny12 only Some AVR devices have on chip EEPROM data memory The ICE 200 emulates the EEPROM by using an SRAM replacement inside the AVR emulator chip This is done to eliminate problems with EEPROM write endurance However by doing so a new prob lem is introduced since a power loss on the target will result in loss of the data stored in the SRAM that emulates the EEPROM A split solution handles the power loss situation First select the EEPROM restore option Before removing the power take a snapshot of the EEPROM contents by press ing the EEPROM snapshot button Figure 4 13 This will tell the ICE 200 main board to read all EEPROM data into a buffer When power is switched off and then on again the ICE 200 will restore the contents of the buffer to the SRAM before starting code execution Figure 4 13 EEPROM Snapshot Button The default communication speed between AVR Studio and the ICE 200 is 19200 bps If the option 115200 bps Communication is selected the communication speed is changed to 115200 bps Some systems cannot handle this speed so if AVR Studio looses contact with the emulator after enabling this option it should be disabled When selecting ATtiny12 an additional option selection appears in the emulator options dialog box The ATtiny12 device has a programmable fuse that lets the RESET pin func tion as an
6. 6 4 Contact Information 6 3 AMEL AVR ICE 200 User Guide AIMEL 1 1 1 2 1 3 1 4 1 5 About this Manual Helpful Information Tips Checklists Related Documentation AVR ICE 200 User Guide Section 1 Preface Read this First This user guide serves as a reference manual for the Atmel AVR ICE 200 in circuit emulator The AVR ICE 200 User Guide is an easy introduction on how to use the ICE 200 and a detailed reference for advanced users Throughout the manual many refer ences to the AVR microcontrollers are made in short form i e AT90S2313 is referred to as 82313 and so on The user should install the latest version of the AVR Studio available on the Atmel web site This manual contains helpful information to improve the reliability performance and longevity of the ICE 200 and the target system NOTICE This is a Notice Please follow the instructions in a NOTICE carefully Some sections contain useful tips for using the ICE 200 All the tips are emphasized as shown in the example below amp Tip This is a tip When the detailed descriptions in the Connecting to the Target Application and in the Configuration sections have been used and you are beginning to feel comfortable with the use of the ICE 200 you can use the checklists at the end of these sections for fast setup of a new project The checklists are of great help for getting the debugging system online without problems
7. User Guide Using the ICE 200 The procedure in this section must be followed when setting up the emulator The end of this section contains a useful checklist for ensuring fast and safe installation of the system 1 Before connecting the ICE 200 to the target application make sure that the ICE 200 and the target application are not powered This also applies when the ICE 200 is removed from the target When connecting or disconnecting the ICE 200 from the host PC make sure that neither the ICE 200 nor the target application is powered 2 Start inserting a personality adapter see Figure 4 7 Make sure that pin 1 on the personality adapter corresponds with pin 1 on the target socket Figure 4 7 Inserting a Personality Adapter into the Target Hardware AIMEL 47 Using the ICE 200 4 8 3 If the flexible printed circuit cable FPC is not already connected to the pod and the main board connect it as shown in Figure 4 8 Note that the FPC lead prints must face up Figure 4 8 Mounting the FPC to the pod and the Main Board is i 4 Mount the pod onto the personality adapter as shown in Figure 4 9 Do not use force since the pod only fits one way into the personality adapter Figure 4 9 Mounting the pod onto the Personality Adapter 5 Connect the ICE 200 to the host PC Use the 9 pin RS232C cable that is shipped with the ICE 200 Connect the male cable connector to the ICE 200 and the female cable connector to th
8. configuration of the part you are using This is required when an application code project is opened for the first time but can later be changed in the emulator options menu The configuration is stored in a separate file project name avd in the same directory as the application code Follow the procedure described below to configure the ICE 200 1 Connect the ICE 200 and start AVR Studio as described in previous section 2 Open the object file If the file is opened in AVR Studio for the first time the Emulator Options Window automatically appears see Figure 4 12 The red LED will now be turned off and the green will be turned on if it is not already on indi cating that the connection between the ICE 200 and the host PC is established Figure 4 12 ICE 200 Configuration Dialog ICE 200 Configuration x Device ATiny12 P DIP Reset Delay HARTE M Single Step Timers M Restore EEPROM Contents T 115200 bps Communication M Enable External Reset x Notes Program Memory 1024 Butes Data Memory OBytes Eeprom Memory 64 Bytes 3 Setup the desired configuration A detailed description is found in the following sections however the default settings are sufficient in most cases due to the automatic personality adapter detection 4 Press the OK button 5 The ICE 200 is now ready for use Tip To change configuration for the current project select the Option Emulator Options menu
9. following items m ICE 200 Main Board pod and two Flexible Printed Circuit Cables m Personality Adapters for ATtiny12 8 pin DIP AT90S2313 20 pin DIP AT90S2333 4433 28 pin DIP AT90S4414 8515 40 pin DIP AT90S4434 8535 40 pin DIP m 9 pin RS232C Cable m Atmel CD ROM containing AVR data books Application notes AVR Studio AVR Assembler m ICE 200 User Guide this document m Power Cable m Diagnostic Adapter for Test Purposes AIMEL AVR ICE 200 User Guide 2 3 System Requirements 2 3 1 Hardware Requirements 2 3 2 Software Requirements 2 3 3 Operating Conditions 2 3 4 Host Interface AVR ICE 200 User Guide Introduction Pentium class personal computer with the following specifications is recommended m 16M Byte RAM or more m 3M Byte of free hard disk space m CD ROM or Internet access for software and data books m VGA monitor or better m 16650 Compatible Serial Port COM port The following operating systems are currently supported by AVR Studio m AVR Studio v2 00 or later installed See the Atmel web site www atmel com for latest version m Microsoft Windows NT 3 51 m Microsoft Windows NT 4 0 m Microsoft Windows 95 m Microsoft Windows 98 Note AVR Studio will be updated to execute new versions of these operating systems See AVR Studio User Guide for latest information m Operation Temperature 0 C 70 C m Operating Humidity 10 90 RH non condensing m Supply Voltage 9 0V to 12
10. may be trademarks of others
11. of Contents 4 9 Emulator Options Settings ursnnsensseennnnnnnnnnnnnnnnnnnnnnnnnnnennnnn mann 4 11 4 9 1 Device Settings un eunneeeeee ne 4 11 4 9 2 Clock Selection Settings 4 11 4 9 3 Single step Timers Setting 00snnesnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 4 11 4 9 4 EEPROM Restore Setting sunnseennnnnensnnnnnnnnnennnnnnnnnnn mann 4 12 4 9 5 Communication Speed Setting eeeeesseeeeesseresresrrsssrnssennesnrnren ene 4 12 4 9 6 Reset Pin Setting ATtiny12 only 4 12 Section 5 Special Considerations 4442444000044nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 5 1 5 1 External RESET aserid aE aaa aaa aa aE 5 1 5 2 SLEEP Instruction ner ens 5 2 5 3 Watchdog Timer WDT inia 5 2 5 4 EEPROM anna a nite desi ee ela ee ee 5 3 55 WO Port Access einen ns 5 3 5 6 16 bit I O Access Timer 1 and A D Converter 5 4 5 7 VART Data Register ann 5 4 Section 6 ADDEN en a ee ee ee 6 1 6 1 Emulating AT90S1200 and ATtiny10 11 6 1 6 1 1 Using the Include Files 6 1 6 1 2 Using the ATtiny12 Adapter for Emulating the ATtiny10 11 6 2 6 1 3 Using the AT90S2313 Adapter for Emulating the AT90S1200 6 2 6 2 AVR Emulator Chip Errata ssrsnennnnnnnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnn nn 6 2 6 3 Troubleshooting ci3 canh coin enon TA 6 3 6 3 1 Feedback and Support 6 3
12. time control unlimited number of breakpoints symbolic debugging and full memory and register visibility Multiple ICE 200 emulators can be used by AVR Studio at the same time only limited by the number of serial ports available giving a high degree of flexibility 2 1 Introduction 2 1 2 2 2 2 ICE 200 Features ICE 200 Contents m Devices Supported ATtiny12 AT90S2313 AT90S2333 4433 AT90S441 4 8515 AT90S4434 8535 ATtiny10 11 using ATtiny12 adapter AT90S1200 using AT90S2313 adapter m Supports 8 MHz 4 0V to 6 0V AVR Emulator Chip varies between devices being emulated m Wide Target Voltage Range 2 7V to 5 5V m Emulator Chip Provides Excellent AC Characteristics m Non intrusive m Target Voltage Sensing Ensures Secure Operation m Personality Adapter for Each of the Supported Processors m 32 bits Cycle Counter m O Continues to Operate in Halt State After a Break or Breakpoint m Single stepping or Continuous Timer Operation while Single stepping Code Utilizes the AVR Studio Debugging Environment that adds Full Run Time Control run break trace into step over step out run to cursor reset autostep and multistep m Unlimited Number of Breakpoints m Symbolic Debugging Support m Full Visibility of and Access to register File SP PC and Memories m Access to all I O Registers See Section 5 Special Considerations m Auto Log Points Non real Time Logging Watches The ICE 200 contains the
13. 0 IMPORTANT Since the AT90S2313 uses a stack pointer this has to be initialized The simplest way is include the following lines at the top of the program code AVR Assembler example ldi r16 0x65 Set the stack pointer to point at the address to give a 3 level deep stack out 0x3D r16 The AT90S2313 has no RC oscillator so this feature found on the AT90S1200 can not be supported Since the AT90S2313 features the EEMWE bit for writing data to the EEPROM memory this must also be added to the AT90S1200 code ifthe EEPROM is used Include the AT90S2313 file when emulating AT90S1200 to get the interrupts placed on the right locations see Section 6 1 1 Latest errata is found on the Atmel web site www atmel com AIMEL AVR ICE 200 User Guide 6 3 Troubleshooting 6 3 1 Feedback and Support 6 4 Contact Information AVR ICE 200 User Guide Appendix If you experience problems when installing AVR Studio connecting the emulator or configuring the emulator first of all use the checklists in the previous sections to confirm that you have done installation and the setup of the emulator correctly To get correct answers to your problems please include the following details in your request ICE 200 AVR Studio m Details of which release of ICE 200 you are using m Details of the platform on which you are running OS amount of memory etc m A small stand alone sample of code which reproduces the problem m clea
14. 0V DC or 9 0V AC m Supply Current 400 mA NOTICE Violating the recommended operating conditions for the ICE 200 might cause incorrect operation and damage the emulator RS 232C 19200 bps 1 start 8 data and 1 stop bit no parity 9 pin female connector AIMEL 23 Introduction 2 4 AIMEL AVR ICE 200 User Guide AIMEL Section 3 General Description Figure 3 1 shows a simplified block diagram of the ICE 200 connected to a target board the application Power supplies and a host PC are also shown Figure 3 1 ICE 200 Simplified Block Diagram Main Board 5 0V Power Supply Program Memory K Control and POD FFC AT90EMOA Communication HostPC gt a Logic Level Converters Personality Adapter Target MCU Socket f Target Clock Power or XTAL or Supply Resonator Target Board 2 7 5 5V AVR ICE 200 User Guide 3 1 General Description The main board Figure 3 2 contains the program memory overlay memory which holds the application code that is being emulated The main board also contains logic for communicating with the host PC and the breakpoint logic The level converters allow the target to operate at a different supply voltage from that of the emulator The level converters also protect the emulator and the target from being damaged if only one of them is powered Due to th
15. 4 MHz foso AT90S85 15 4414 32 768 kHz 4 MHz foso AT90S8535 4434 32 768 kHz 4 MHz NOTICE Using the ICE 200 outside the recommended operating conditions will cause incorrect operation and can damage the emulator 4 2 AIMEL AVR ICE 200 User Guide 4 4 Personality Adapters AVR ICE 200 User Guide Using the ICE 200 The ICE 200 is supplied with five different personality adapters Each adapter makes the pinout mapping for one or more AVR microcontrollers amp Tip Mounting a DIP socket on the personality adapter reduces the risk of breaking pins on the adapter thus extending adapter lifetime Tip You can mount additional DIP sockets to the adapter to increase the space between the adapter and the target However the number of extra sockets should be kept at a minimum If you are utilizing surface mount device SMD versions of the supported AVR micro controllers you need to obtain an SMD adapter that converts from DIP to the appropriate socket Figure 4 1 Personality Adapter for ATtiny12 ATadap3400 AIMEL 43 Using the ICE 200 4 4 Figure 4 2 Personality Adapter for AT90S2313 ATadap3300 AIMEL AVR ICE 200 User Guide Using the ICE 200 Figure 4 4 Personality Adapter for AT90S8515 4414 ATadap3000 NOTICE Do not change personality adapter without turning power off on both the emulator and the target AVR ICE 200 User Guide AIMEL 4 5 Using the ICE 200 Special Tiny12 Personality
16. AVR ICE 200 User Guide AVR ICE 200 User Guide LEE i Table of Contents Section 1 Preface Read this FRE ns 2a 1 1 1 1 About this Manual 1 1 1 2 Helpful Information us 1 1 1 3 TPS a ea eh eine 1 1 1 4 Checklists iiser irii enaa aE E E G 1 1 1 5 Related Documentation sun 1 1 Section 2 rO QUC HO Mesene a ee 2 1 2 1 IGE 200 Features osiin annen inaani aaa AG 2 2 2 2 IG 200 COntentS eiia see ee 2 2 2 3 System Requirements nen 2 3 2 3 1 Hardware Requirements nenn nnnnnnnnn nn 2 3 2 3 2 Software Requirement uusnsenssennnsnnnnnsnnnnnnnnnnnnnnnnnnnnnnnnnonnnnnnnnnnn 2 3 2 3 3 Operating Conditions 2 3 2 34 Ho st Interface issus timide he dinde 2 3 Section 3 General Description ressent 3 1 Section 4 Using the ICE 200 une 4 1 4 1 Target Hardware Requirements 4 1 4 2 Power and Signal Operating Conditions cccceeceeeeeeeeeeeeeeeeteeeeeeeeeee 4 1 4 3 Clock Driver Requirements 200usnnennsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nn 4 2 4 4 Personality Adapters 2 4 3 4 5 Special Tiny12 Personality Adapter Settings 4 6 4 6 Connecting to the Target Application 4 7 4 6 1 Checklistset een 4 9 4 7 Configuration sissit ea aa a a aiaa Ea 4 10 48 Quick Start sain antenne a Bee ieee eek 4 10 4 8 1 Checklist 82e ee 4 11 AMEL Table
17. The main board is working with 5V supply and the pod uses the target voltage Therefore a level converter is inserted between the two systems The extra logic and the level converters introduce a small and for most of the time negligible delay Note that the voltage converters do not handle a 12V input voltage on the RESET pin which is used for enabling the parallel programming on standard parts After a power up the reset is forced active while configuring the AVR emulator chip introducing a 1 10 ms delay 5 1 Special Considerations 5 2 SLEEP Instruction 5 3 Watchdog Timer WDT 5 2 If a SLEEP instruction is executed and sleep is enabled the AVR emulator chip will enter one of the AVR low power modes power down power save or idle The power con sumption will be slightly higher compared to the real chip due to the higher complexity of the emulator chip In room temperature 25 C this is not significant amp Tip When debugging your application you can replace the SLEEP instruction with a NOP by using macros IAR C example ifdef SLEEPEMU define SLEEP _SLEEP else define SLEEP _NOP endif The watchdog timer operates asynchronously it has its own clock to the rest of the system The watchdog timer reset instruction is therefore repeatedly issued in stopped mode to avoid false resets if the watchdog timer is enabled Debugging the exact timing of the WDT behavior while doing single stepping or wh
18. clude files AVR Assembler example include 1200def inc org 0 rjmp RESET_Handler org INTOaddr rjmp INTO_Handler org OVFOaddr rjmp OVFO_Handler org ACIaddr rjmp ACI_Handler program code starts here 6 1 Appendix 6 1 2 6 2 6 2 Using the ATtiny12 Adapter for Emulating the ATtiny10 11 Using the AT90S2313 Adapter for Emulating the AT90S1200 AVR Emulator Chip Errata The ATtiny10 and 11 are both subsets of ATtiny12 Therefore it is possible to select the ATtiny12 device when configuring the ICE 200 to support either ATtiny10 or ATtiny11 These devices all have the same pinout but ATtiny10 11 does not have the following features Brown Out Detection BOD e Calibration of the RC Oscillator e Reset Source Register Band gap Reference on the Comparator EEPROM Interrupt Also note that the startup times differ slightly between the devices Please refer to the datasheets for more detailed information The AT90S1200 can be defined as a subset of AT90S2313 They have the same pinout but AT90S1200 does not have the following features UART SRAM Memory Access Instructions Id st Ids sts Idd std Ipm 16 bit Arithmetic Instructions adiw sbiw INT1 Timer Counter 1 and Input Capture Stack Pointer to SRAM AT90S1200 has a 3 level hardware stack Avoiding the use of these features and using only half the program and EEPROM memories allows the AT90S2313 to be used when emulating AT90S120
19. e host Figure 4 10 Connecting the ICE 200 to a Host PC AVR ICE 200 User Guide Using the ICE 200 6 AVR Studio can now be started However do not open any files before connect ing power supply to the ICE 200 If the ICE 200 is not powered then AVR Studio cannot detect the emulator and therefore enters simulation mode 7 The ICE 200 has no power switch Just connect the power supply cable shipped with the ICE 200 to a 9V to 12V DC or a 9V AC power supply and then con nect the power cable to the ICE 200 see Figure 4 11 A battery eliminator is a good alternative to the laboratory power supply shown on the figure Figure 4 11 Connecting Power Supply to ICE 200 8 Enable the target power supply The red LED will now be lit telling that power is present but no connection to the host PC has been established The hardware is now ready for use Use the checklist below to ensure that the setup was done correctly and then proceed to the next section Configuration 4 6 1 Checklist O Turn off power on all units O Insert personality adapter O Pins on adapter agree with pins on target O Mount pod O Mount FPC first time only do not disassemble O Connect RS232C cable O Turn on power on all units N 1 8 D AVR ICE 200 User Guide AIMEL 4 9 Using the ICE 200 4 7 4 8 4 10 Configuration Quick Start When the ICE 200 is connected to the target application the next step is to set the device
20. e the 16 bit read or write problem will not occur in this situation Reading the UART Data Register cleans the RXC bit in the UART Control Register Hence the monitor program does not attempt to read the UART Data Register There fore the value displayed by AVR Studio for this register does not reflect the real value of this register AIMEL AVR ICE 200 User Guide AIMEL 6 1 Emulating AT90S1200 and ATtiny10 11 6 1 1 Using the Include Files AVR ICE 200 User Guide Section 6 Appendix Always use include files for the I O registers addresses and for bit definitions in your source code files This will ease the process of porting code from one microcontroller to another The files can be found on the CD ROM which is included in the ICE 200 kit Copy the include file to your project directory and include it in the top of the program code as shown below AVR Assembler example include 1200def inc Then when writing a value to a I O register use the following notation AVR Assembler example ldi r16 1 lt lt DDD1 1 lt lt DDD4 Set port D pin 1 and 4 as output and the rest as input out DDRD r16 Note the use of the bit definitions DDD1 and DDD4 are pin definitions in form of bit position and therefore they must be shifted this number of bits to the left to make a correct mask Interrupt vector locations might differ from part to part This is easily handled by using the vector definitions found in the in
21. en stopping the program execu tion is therefore not supported by the ICE 200 Disabling WDT is secured by the WDTTOE WDT turn off enable bit Following is an assembly program example that shows a WDT disable sequence disableWDT Certi only needed if any interrupts are in use ldi r16 1 lt lt WDTTOE 1 lt lt WDE Set the WDT turn off enable bit and the WDE bit out WDTCR r16 ldi r16 0 lt lt WDE out WDTCR r16 Within 4 cycles clear the WDEbit done sei only needed if any interrupts are in use The four cycle time out for the WDT disabling is not supported by the AVR emulator chip when in stopped mode This means that single stepping this sequence will not disable the WDT Tip You can use the run to cursor to the instruction after the WDT enable bit is cleared labelled done in the example above instead of doing single step ping Or use the following macro for AVR assembler only MACRO macro disableWDT CEE ldi r16 1 lt lt WDTTOE 1 lt lt WDE out WDTCR r16 ldi r16 0 lt lt WDE out WDTCR r16 sei endmacro USAGE disableWDT AIMEL AVR ICE 200 User Guide 5 4 EEPROM 5 5 1 0 Port Access AVR ICE 200 User Guide Special Considerations When writing to the on board EEPROM on an AVR device a special sequence must be used to ensure the integrity of the EEPROM data Following is an assembly program example that shows an EEPROM write sequence wr
22. han those expressly contained in the Company s standard war ranty which is detailed in Atmel s Terms and Conditions located on the Company s web site The Company assumes no responsibility for any errors which may appear in this document reserves the right to change devices or specifications detailed herein at any time without notice and does not make any commitment to update the information contained herein No licenses to patents or other intellectual prop erty of Atmel are granted by the Company in connection with the sale of Atmel products expressly or by implication Atmel s products are Atmel Operations Atmel Colorado Springs 1150 E Cheyenne Min Blvd Colorado Springs CO 80906 TEL 719 576 3300 FAX 719 540 1759 Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4 4253 6000 FAX 33 4 4253 6001 not authorized for use as critical components in life support devices or systems Fax on Demand North America 1 800 292 8635 International 1 408 441 0732 e mail literature atmel com Web Site http www atmel com BBS 1 408 436 4309 Microsoft Windows and Windows NT are trademarks of Microsoft Corporation Pentium is a trademark of Intel Corporation Acrobat Reader is trademark of Adobe Systems Incorporated Printed on recycled paper All other marks bearing and or are registered trademarks and trademarks of Atmel Corporation Terms and product names in this document
23. he ICE 200 Personality Adapter for the AT90S8535 ATadap31 00 AIMEL 3 5 General Description 3 6 AIMEL AVR ICE 200 User Guide AIMEL 4 1 Target Hardware Requirements 4 2 Power and Signal Operating Conditions AVR ICE 200 User Guide Section 4 Using the ICE 200 Before opening the ESD protection bag take precaution to eliminate electrostatic dis charge Always use ESD protected tools and clothing when using the ICE 200 Grounded wrist band and static dissipative work surface provides the most efficient ESD protection The ICE 200 should be handled with the same care as any CMOS component NOTICE ESD Electrostatic Discharge SENSITIVE DEVICE Do not use the ICE 200 outside an ESD protected environment A discharge may result in permanent damage or performance degradation The target application hardware must include both power supply and a clock source The ICE 200 can not function unless these conditions are met Note that the emulator also supports the internal RC oscillator option to the Tiny12 device Tip You can use an AVR development board ATMCU00100 or ATSTK200 for using the ICE 200 as a standalone emulator platform Please follow the recommended operating conditions listed in the next two sections These conditions also apply for the standard AVR microcontrollers Table 4 1 Recommended Operating Conditions Power and Signals T 0 C to 70 C Voc 2 7V to 5 5V GND OV
24. ing a specific device enter the emulator options menu and select the device from the device list Many AVR microcontrollers have fuse bits for selecting the reset delay time The reset delay is necessary for the clock oscillator to stabilize The time it takes for the oscillator to stabilize depends on the crystal or the resonator If an external clock source is used then the reset delay can be set to only a few clocks The reset delay fuse bits CKSEL FSTRT depending on device can be set or cleared by a parallel or serial pro grammer in an actual device In the emulator they are set in the options menu For more information about the reset delay fuses please refer to the datasheets This setting allows single stepping of the timers if checked If cleared the timers con tinue to count if enabled even after the program execution is stopped by a user break or breakpoint All other peripherals SPI UART EEPROM PORTs continue to operate when the program execution is stopped This feature allows cycle by cycle debugging of the counter value which is useful for event timing However in many cases stopping the counter operation while debugging might not be desired One example is when the timer is used in PWM mode Stopping the timer in this case might damage the equipment that is being controlled by the PWM output Note that eventual timer interrupts will not be handled before execution is resumed AIMEL 4 11 Using the ICE 200 4 9 4
25. input pin PB5 When this option is selected PB5 functions as a normal reset pin When this option is not selected PB5 functions as an input pin The device is then only reset at power on or when giving a reset command from AVR Studio Refer to the ATtiny12 datasheet for more information AIMEL AVR ICE 200 User Guide AIMEL 5 1 External RESET AVR ICE 200 User Guide Section 5 Special Considerations The ICE 200 accurately emulates most AVR features However there are some differ ences worth noting Most of the exceptions apply to controlling the program flow i e single stepping and so on Program flow control is an extension to the normal functions of the microcontroller that allows the user to do the debugging This extension must not interfere with the normal program execution run mode If the program execution is stopped stopped mode and then restarted or the program is executed line by line single stepping the program functionality can in some cases be affected The ICE 200 main board has to be able to control the reset pin on the AVR emulator chip An external reset source must therefore go via the control logic as shown on Figure 5 1 This is handled automatically by the pod and main board Figure 5 1 ICE 200 External RESET Circuit MAIN BOARD POD 5 D 2 I i RESET External RESET oO 3 gt o ENABLE ser I gt D gt 5 gt FORCE RESET
26. is feature a strict power up sequence is not required Figure 3 2 ICE 200 Main Board k Ai Ma P 1 a LL t T a a i i E a aa ni tu SRARA SAA A Fe AIMEL AVR ICE 200 User Guide 3 2 General Description The FPC or Flexible Printed Cable Figure 3 3 connects the main board to the ICE 200 Pod The actual appearance of the FPC may differ from the figure Figure 3 3 ICE 200 FPC y a S h b k ks L r u Eu a A a Pa Pr a 2 A juan Bp a Pi Be 3 LE T Tp Er 5 ki h Po T T EL amp u Tp A a P k NOTICE The Flexible Printed Cable must not be folded NOTICE Do not disassemble the Flexible Printed Cable from the pod or ICE 200 main board AVR ICE 200 User Guide AIMEL 3 3 General Description 3 4 The pod Figure 3 4 contains the AVR emulator chip Note that the AVR emulator chip must be supplied with power and a clock source i e a crystal resonator oscillator or any other clock generator from the target Figure 3 4 The ICE 200 Pod AIMEL AVR ICE 200 User Guide AVR ICE 200 User Guide General Description The personality adapters Figure 3 5 map the pinout from ICE 200 Pod to each microcontroller it supports The adapters include an identification code that AVR Studio uses for automatic device type detection The ICE 200 kit contains five different personality adapters for dual in line package devices Figure 3 5 T
27. iteEEPROM CET only needed if any interrupts are in use sbi EECR EEMWE sbi EECR EEWE done sei only needed if any interrupts are in use The four cycle time out for the EEPROM write is not supported by the AVR emulator chip when in stopped mode This means that single stepping this sequence will not strobe an EEPROM write amp Tip You can use the run to cursor to the instruction after the EEPROM write enable bit is set labeled done in the example above instead of doing single stepping Or use the macro defined below MACRO macro writeEEPROM elai sbi EECR EEMWE sbi EECR EEWE sei endmacro USAGE writeEEPROM A special situation occurs when single stepping a change of the PORT value as shown in the following example write_with_readback ldi r16 OxFF Set all pins as output out DDRx r16 iP NS out PORTZ r16 Set the PORTx values in r16 PINx Read the PINx values in r17 PINx Read the PINx values When running this example program at full speed in the ICE 200 or in a real chip the value read back in r16 will not end up being the value written at the first line but will contain the value the port pins had the cycle before the port was written This is the correct behavior The PINx value must be synchronized and therefore it is delayed one cycle to avoid erratic port behavior caused by metastability r17 will therefore contain the value written to the port However when the program is single ste
28. pped the value of the PINx will change immediately after the single step and the value of r16 will contain the same value as before Changing pin values on an I O port from AVR Studio when the ICE 200 emulator is stopped does not represent any problem However note that as for the single stepping case the pin values are changed immediately Clearly this is not a real problem but it is important to be aware of the effects of the two cases described above If not an incorrect program might seem to work in the emulator but will not work in the real chip AIMEL 5 3 Special Considerations 5 6 16 bit I O Access Reading or writing 16 bit values directly from AVR Studio can cause some problems To Timer 1 and A D Converter 5 7 UART Data Register 5 4 read for example the counter value from timer 1 a 16 bit value one of the bytes must be stored in a temporary register This temporary register will be corrupted if the 16 bit value is read when the program execution is stopped amp Tip Using the following macros for AVR assembler only will solve the 16 bit access problem when using symbolic debugging MACROS macro outw cli out 2 O out 2 1 1 sei endmacro macro inw cli in 2 0 1 in 1 O sei endmacro USAGE inw r17 r16 TCNTIH Reads the counter value outw TCNTIH r17 r16 Writes the counter value When using symbolic debugging in C the entire C line is executed for each set There for
29. r explanation of what you expected to happen and what actually happened m The commands or menu selections you used m Sample output illustrating the problem m The information shown in the About dialog box in AVR Studio version numbers m The emulated device Documentation m The manual title and revision m The page number s m concise explanation of the problem General suggestions for additions and improvements are also welcome For technical support please contact your distributor Atmel sales representative or local Atmel sales office Atmel sales offices and distributors are listed in the AVR Databook and on the Atmel web site www atmel com AIMEL Appendix Appendix AVR ICE 200 User Guide AIMEL 6 5 Appendix 6 6 AIMEL AVR ICE 200 User Guide AMEL T Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose CA 95131 TEL 408 441 0311 FAX 408 487 2600 Europe Atmel U K Ltd Coliseum Business Centre Riverside Way Camberley Surrey GU15 3YL England TEL 44 1276 686 677 FAX 44 1276 686 697 Asia Atmel Asia Ltd Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721 9778 FAX 852 2722 1369 Japan Atmel Japan K K 9F Tonetsu Shinkawa Bldg 1 24 8 Shinkawa Chuo ku Tokyo 104 0033 Japan TEL 81 3 3523 3551 FAX 81 3 3523 7581 Atmel Corporation 1999 Atmel Corporation makes no warranty for the use of its products other t
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