PICKIT™ 2 PROGRAMMER-TO-GO USER GUIDE
Contents
1. state When the Target LED blinks approximately 2 Volts will appear on the PICkit 2 ICSP connector VDD pin As the minimum target VDD allowed for PICkit 2 operation is 2 5 Volts and the PICkit 2 VDD output contains a diode to prevent backpowering from the target VDD this situation is not a concern However when PICkit 2 is set up to provide VDD to the target the target will see the 2 Volt pulses while the LED is blinking Ensure this will not cause a problem for the target If a short or heavy load exists on the VDD signal when PICkit 2 is connected and blinking it may cause a VDD Error Disconnect the PICkit 2 from the target and clear the error by pressing the pushbutton 2008 Microchip Technology Inc Page 13 of 14 PICkit 2 Programmer To Go Users Guide 5 1 Exiting Programmer To Go Mode To exit a PICkit 2 unit from Programmer To Go mode plug into a PC USB port and connect to use the unit with either the PICkit 2 Programmer software PK2CMD or MPLAB IDE In the PICkit 2 Programmer software use Tools gt Check Communications to connect to a PICkit 2 unit Note Programmer To Go mode cannot be exited while the Busy LED is blinking to indicate an error Press the pushbutton to clear the error before attempting to connect 2008 Microchip Technology Inc Page 14 of 142. 2 Programmer To Go Users Guide FIGURE 4 2 WIZARD DOWNLOAD SETTINGS SCREEN Programmer To Go Wizard Download to PICkit 2 Download Summary PIC16F887 Data source C 0 Board 07 Reversible Reversible HEX Target is Powered Min YDD 4 5 Volts Write entire device Device will be verified Fast Programming is ON MCLR kept asserted during amp after programming Click the DOWNLOAD button below to set up PICkit 2 for Programmer To Go operation Click Download to store the memory image and settings in the PICkit 2 unit and place it in Programmer To Go mode 4 2 3 Download to PICkit 2 Complete The screen in Figure 4 3 will appear when the download is complete The PICkit 2 unit s Target LED should now be blinking twice in succession to indicate it is in Programmer To Go mode and ready to program Disconnect the PICkit 2 from the PC USB port When any USB power source is applied the PICkit 2 unit will power up in Programmer To Go mode indicated by the blinking Target LED Click Next gt to view a wizard screen giving examples of Programmer To Go error codes covered in Section 5 of this document or click Exit to close the Wizard dialog 2008 Microchip Technology Inc Page 11 of 14 PICkit 2 Programmer To Go Users Guide FIGURE 4 3 WIZARD DOWNLOAD COMPLETE SCREEN Programmer To Go Wizard Download Complete The PICkit 2 unit will indicate it s in Pragrarnmer To Go mode and ready to program by bl
3. 2 USB port 2 1 Power Requirements The USB power source used should meet the following minimum criteria e Is able to supply at least 100mA of current to the PICkit 2 unit e Provides a steady regulated 4 5 Volt to 5 5 Volt output at a load of 30mA to 100mA A 160 Ohm resistor between the USB power output and ground gives a quick check of the low end 30mA voltage Use a 47 Ohm resistor to test voltage at about 100mA Note Most portable chargers power devices with their own batteries will not give an indication when their internal battery voltage gets low and the output drops below 4 5 Volts Therefore it is up the user to be sure the device s battery has sufficient remaining capacity to power the PICkit 2 above 4 5 Volts 2 2 Example Battery based Portable USB Power Sources The following two products are shown only for the purpose of illustrating the options available for portable PICkit 2 Programmer To Go USB power sources They are neither specifically endorsed nor recommended by Microchip Technology Inc Note Any battery based power sources should be disconnected from the PICkit 2 unit when it is not in use Otherwise the PICkit 2 unit will drain the power source battery 2008 Microchip Technology Inc Page 2 of 14 PICkit 2 Programmer To Go Users Guide 2 2 1 Bluegears b mobile Emergency Cell Phone Charger This device is a small mini B USB power source that can recharge its internal battery cell from a USB port v
4. 2008 Microchip Technology Inc Page 5 of 14 PICkit 2 Programmer To Go Users Guide 3 1 Increasing the Memory for PICkit 2 Programmer To Go The memory in the PICkit 2 unit available for Programmer To Go code storage may be doubled thus doubling the Program Memory size limitations shown in Table 3 1 To expand the memory it is necessary to replace the two 24LC512 64KB EEPROMs on the PICkit 2 PCB at U3 and U4 with two 24LC1025 I SM 128KB EEPROMs This increases the total EEPROM memory from 128KB to 256KB It is important to note that the 24LC1025 EEPROMs require the A2 pin tied to VCC for proper operation per the datasheet The PICkit 2 circuit board has the A2 pads connected to ground Therefore when replacing the 24LC512s with 24LC1025s the A2 pin must be lifted so it does not contact the pad and wired to the VCC pin of the part It is also necessary to modify the PICkit 2 Programmer INI file so the software is aware of the expanded EEPROM space Follow the steps below to complete and use a memory upgrade for your PICkit 2 unit 1 Open the PICkit 2 case by prying it apart with a small flat screwdriver at the three indentations along the seam at a long edge of the case 2 Remove the 24LC512 serial EEPROMs at reference designators U3 and U4 from the PCB 3 Lift the A2 pins of two 24LC1025 I SM serial EEPROMs so they do not contact the circuit board pad when placed on the PCB 4 Solder the two 24LC1025 EEPROMs in place at U3 and U4 on the
5. Users Guide 3 2 Other Limitations of PICkit 2 Programmer To Go PICkit 2 Programmer To Go only supports the WRITE programming operation It cannot be set up to READ VERIFY only or BLANK CHECK a device Note that an ERASE can essentially be set up by leaving all the PICkit 2 Programmer software buffers blank If Programmer gt Verify on Write is checked then PICkit 2 Programmer To Go will verify the device it programs The PICkit 2 Programmer To Go verify is accomplished by calculating a checksum of the programmed device and comparing it with an expected value 3 2 1 PIC18F Preserve EEPROM Data on Write Limitation When programming a device with the EEPROM Data memory region Enabled checkbox unchecked PICkit 2 will write Program Memory User IDs and Configuration words but preserve the existing EEPROM Data memory in the device For most PICI8F devices this may be done with PICkit 2 Programmer To Go However on some of the PIC18F devices the EEPROM Data memory must be read from the device first then reprogrammed with the other memory regions For these devices PICkit 2 Programmer To Go does not support preserving the existing device EEPROM Data An error will be given in the software if the user attempts to set up such an operation for an affected device 4 Setting up PICkit 2 for Programmer To Go Operation Before downloading a memory image to PICkit 2 for Programmer To Go operation the PICkit 2 Programmer software options a
6. box determines the provided VDD voltage if PICkit 2 will power the device 4 Test programming on a target device from the PICkit 2 Programmer software 4 2 The Programmer To Go Setup Wizard Once the memory image and programming options for intended target device are set up and tested start the Programmer To Go Setup Wizard via Programmer gt PICkit 2 Programmer To Go The wizard dialog will open to the Welcome screen Click Next gt to go to the Programmer Settings screen 2008 Microchip Technology Inc Page 8 of 14 PICkit 2 Programmer To Go Users Guide 4 2 1 Programmer Settings Screen The Programmer Settings screen allows the user to verify the memory image buffer settings and select the target VDD power options to be used An example is shown in Figure 4 1 Buffer Settings Device Shows the selected target device OSCCAL and BandGap values will be preserved on applicable devices Buffer data source Displays the source of the current buffer memory image to be used Code Protect Displays whether the device will be programmed with protection options Data Protect enabled or not If these options are not set in the imported hex file they may be enabled via the Tools menu Memory Regions Indicates whether the entire device will be programmed if device EEPROM Data memory will be preserved or if only EEPROM Data memory is to be written These options are determined the by the state of
7. memory in the PICkit 2 unit the Programmer To Go function is limited in the size of the memory image that can be loaded Table 3 1 lists supported device families and program memory limitations TABLE 3 1 PROGRAMMER TO GO SUPPORTED DEVICES Program Memory Size Limitations Supported rane Supporad Paris By Bytes By Maximum Used Address Baseline All no limit no limit Midrange All no limit no limit PIC18F All 107264 bytes 0x1A2FF PIC18 J Series All 111872 bytes 0x1B4FF PIC18 K Series All 107264 bytes 0x1A2FF PIC24 All 106560 bytes 0x1157F dsPIC33 All 106560 bytes 0x1157F dsPIC30 All 103872 bytes 0x10E7F dsPIC30 SMPS All no limit no limit Note 1 Supports all family parts that are supported by the PICkit 2 Programmer application See menu Help gt ReadMe for a list of part supported by the application Large memory parts are supported what is limited is the size of the program code that can be programmed by PICkit 2 Programmer To Go 2 Device EEPROM data UserlDs and Configuration memory are taken into account in these size limitations For the sake of simplicity only the Program Memory size determines if the memory image will fit Different device families have different memory overhead requirements affecting the maximum size limitation 3 These families have no practical memory size limit as no devices in the family exceed the actual limit
8. the Program Memory and EEPROM Data Enabled checkboxes on the main application window Verify Device The device will be verified after programming by Programmer To Go if Programmer gt Verify on Write is checked FIGURE 4 1 WIZARD PROGRAMMER SETTINGS SCREEN Programmer To Go Wizard Programmer Settings Buffer Settings Device PICI6F887 Buffer data source C 0 Board 07 Reversible Reversible HEX Code Protect OFF Data Protect OFF Memory Regions Write entire device Verify Device Yes Ciiek CANCEL fo change buffer seftings Power Settings Target has its own power supply C VOD lt 4 5v Use low voltage row erase Power target from PICkit 2 at 5 0 Volts To change PICK 2 VOD voltage click CANCEL and adusi fhe VDD box 2008 Microchip Technology Inc Page 9 of 14 PICkit 2 Programmer To Go Users Guide Power Settings PICkit 2 Programmer To Go may optionally power the target device though usually a target will have its own power supply It is recommended to use PICkit 2 Programmer To Go with a powered target instead of powering it off PICkit 2 Target has its own power supply Select this option if the target will not be powered from PICkit 2 The minimum supported voltage for programming the device will be displayed If the device has a high Bulk Erase voltage but supports a low voltage row erase method a checkbox will be present as shown in Figure 4 1 Check the box if the target VDD
9. O PROGRAMMING OPERATION FEEDBACK CODES LED States Interpretation Target LED Yellow Busy LED Red Code Description 9 blinks No errors were encountered during the inks in succession i i i programming operation PICkit 2 eo oo oo off Success Ready Programmer To Go is ready to program again PICkit 2 was unable to set the VDD or VPP Continuous Rapid voltage to the expected value If PICkit 2 is Off Blinking VDD VPP Error not providing VDD then the error must be a eccccccccce VPP error See Chapter 3 of the PICkit 2 Users Guide for VDD and VPP information PICkit 2 received an unexpected Device ID from the target Ensure the target part matches that selected when off 2 blinks in succession Device ID Error PICkit 2 Programmer To Go was set eo ee o0 oo up May indicate a bad ICSP connection preventing PICkit 2 from communicating with the target Not applicable to Baseline devices The target did not Verify successfully after programming Ensure the target 3 blinks in succession VDD meets the minimum required Off Verify Error 7 eoo ooo ooo With Baseline devices this error may indicate ICSP communication problems An unexpected internal Programmer 4 blinks in succession To Go error occurred If it happens a Off Internal Error eee eoo5o second time try downloading to the PICkit 2 again To clear an error code press the PICkit 2 pushbutton to return to the Ready
10. PICKIT 2 PROGRAMMER TO GO MICROCHIP USER GUIDE 1 Introduction The PICkit 2 Programmer To Go functionality allows a PIC MCU memory image to be downloaded into the PICkit 2 unit for later programming into a specific PIC MCU No software or PC is required to program devices once the PICkit 2 unit is set up for Programming To Go A USB power source for the PICkit 2 is all that is needed Information in this guide covers e USB Power for PICkit 2 Programmer To Go Supported PIC MCU Devices Memory Image Size Limitations PICkit 2 Programmer To Go Wizard Walkthrough LED Status Codes 2008 Microchip Technology Inc Page 1 of 14 PICkit 2 Programmer To Go Users Guide 2 USB Power for PICkit 2 Programmer To Go The PICkit 2 unit hardware prevents it from being powered by the target through the ICSP connector VDD pin Therefore it must be powered by a 5 Volt supply through the USB mini B port at the top of the PICkit 2 Many options exist for providing power Some of these include e Any available PC USB port or USB hub port No USB communication is necessary it is only used to provide power e A USB host port on a portable device e A USB power adapter or charger with a USB mini B connector either from an automotive power jack or an AC wall plug e A portable battery charger or power source for cell phones or other portable devices with USB mini B connector e A custom battery pack that supplies regulated 5 Volts into the PICkit
11. PICkit 2 PCB 5 Solder a wire from the lifted A2 pin to the VCC pin on both 24LC1025 EEPROMs 6 Ensure the PICkit 2 Programmer application is closed 7 Open the INI file c Program Files Microchip PICkit 2 v2 PICkit2 ini in Notepad or another text editor 8 Find the following line in the INI file PTGM 0 9 Edit the value to 1 as shown below and save and close the INI file PTGM 1 The PICkit 2 Programmer application will now recognize and use the doubled memory for PICkit 2 Programmer To Go in the PICkit 2 unit It will indicate the INI file edit was successful by displaying the following text at the bottom of the Programmer To Go Wizard dialog Welcome screen 256K PICkit 2 upgrade support enabled IMPORTANT When replacing the PICkit 2 serial EEPROMs with 24LC1025 devices the A2 pin of the 24LC1025 devices MUST be lifted and connected to the VCC pin or the 24LC1025 serial EEPROMS will not work An upgraded 256KB PICkit 2 unit may be used successfully with PICkit 2 Programmer software that is still configured for the default 128K though any downloads will be limited as per a 128KB unit However the reverse is not true A PICkit 2 unit with the default 128KB may not be used successfully with PICkit 2 Programmer software that is configured to use the 256KB upgrade even if the code size is within the 128KB limits 2008 Microchip Technology Inc Page 6 of 14 PICkit 2 Programmer To Go
12. ell phones FIGURE 2 3 ENERGIZER ENERGI TO GO Informational Points e Uses field replaceable AA batteries e Provides between 5 0 and 5 5 Volt output suitable for powering a target from PICkit 2 e Approximate retail cost 20 US e Manufacturer website www energitogo com Potential Limitations e Looks for a battery by pulsing USB voltage output which may cause PICkit 2 reset problems See NOTE following e Separate cable may be lost FIGURE 2 4 ENERGI TO GO POWERING PICKIT 2 PROGRAMMER TO GO 2008 Microchip Technology Inc Page 4 of 14 PICkit 2 Programmer To Go Users Guide Note The Energizer Energi To Go product pulses the USB voltage output to detect a connected device as shown below This may cause the PICkit 2 s internal microcontroller to improperly reset as its Brown Out Reset BOR is not enabled The BOR is not enabled because it interferes with PICkit 2 VDD error detection Symptoms of the PICkit 2 not coming out of reset properly are that it does not blink the Target LED twice to show it is ready for programming If this happens unplug the Energi To Go from the PICkit 2 and plug it back in Once the blue LEDs on the Energi To Go are blinking it will not pulse VDD again when reconnected nen nan 3 PICkit 2 Programmer To Go Supported Devices All devices in the following families supported by the PICkit 2 Programmer software are supported for Programmer To Go operation However due to limited
13. ia the PICkit 2 mini B USB cable The Bluegears part number is BG01145 The flip open cover reveals a USB mini B male plug that connects directly to the PICkit 2 unit USB port Figure 2 1 shows the device recharging itself off a USB port FIGURE 2 1 BLUEGEARS B MOBILE Informational Points Rechargeable via USB port Small form factor Connects directly to PICkit 2 unit Approximate retail cost 10 US Manufacturer website www bgears com Potential Limitations e Supplied voltage may not be much higher than 4 5 Volts even when fully charged Not recommended for use when PICkit Programmer To Go is powering the target VDD e Does not pass through USB data when connected to both a USB port and a PICkit 2 unit e Rechargeable battery is not replaceable Figure 2 2 shows the Bluegears b mobile being used with a PICkit 2 unit for Programmer To Go operation For the curious the white button turns on a built in LED flashlight when pressed FIGURE 2 2 B MOBILE POWERING PICKIT 2 UNIT FOR PROGRAMMER TO GO OPERATION sumaGant 2008 Microchip Technology Inc Page 3 of 14 PICkit 2 Programmer To Go Users Guide 2 2 2 Energizer Energi To Go Mini USB Cell Phone Charger This portable cell charger device runs off two standard AA batteries and connects via a short cable to the PICkit 2 unit Several versions of this product are available The one that is compatible with PICkit 2 is part number CEL2MUSB for mini USB c
14. inking the Target LED twice in succession E Target Remove the PiCkit 2 from USB now Ifthe PICkit 2 software or MPLAB attempt to connect to the PICkit 2 unit it will exit Programmmer To Go mode For information on powering the PICkit 2 when using Programmer To Go mode click the HELP button For an overview of programming and LED error codes click NEXT 5 Using PICkit 2 Programmer To Go To use PICkit 2 Programmer To Go to program a target device once it has been set up follow the steps below 1 Connect a USB power source as discussed in Section 2 of this document to the PICkit 2 unit 2 Ensure the PICkit 2 Power LED is lit and the Target LED is blinking twice in succession to indicate the unit is in Programmer To Go mode and ready to program 3 Connect the PICkit 2 unit ICSP connector to the target Ensure the target is powered properly if not powering from PICkit 2 4 Press the PICkit 2 pushbutton to begin programming During the programming operation the PICkit 2 Busy LED will remain lit continuously The Target LED will light if powering from PICkit 2 but will remain off if the target has its own power supply When the programming operation is complete the PICkit 2 unit will provide feedback on the operation via the unit LEDs See table 5 1 for a list of display codes 2008 Microchip Technology Inc Page 12 of 14 PICkit 2 Programmer To Go Users Guide FIGURE 5 1 PROGRAMMER TO G
15. nd buffers should be set up as desired during Programmer To Go operation In fact it is highly recommended to test programming a target device from the software first with all desired options to ensure the device programs as expected before downloading an image to Programmer To Go 2008 Microchip Technology Inc Page 7 of 14 PICkit 2 Programmer To Go Users Guide 4 1 Set Up Programming Data and Options A checklist of steps includes 1 Ensure the PIC MCU part number you wish to program is the active device Use the Device Family menu to select the proper family first It must show up at the top of the Device Configuration area of the PICkit 2 window Ifa target part is not available to connect to select Programmer gt Manual Device Select This allows the part number to be selected from a combo box 2 Load the memory image to be programmed into the PICkit 2 buffers This may be done via File gt Import Hex or by a READ operation on an existing device 3 Set the PICkit 2 Programmer software options as desired The following options affect Programmer To Go operation For detailed information on an option please consult the PICkit 2 User s Guide via Help gt PICkit 2 User s Guide Programmer gt Verify on Write Programmer gt Hold Device in Reset Tools gt Enable Code Protect Tools gt Enable Data Protect Tools gt Use VPP First Program Entry Tools gt Fast Programming The VDD PICkit 2 device VDD
16. will be below the voltage shown Power the target from PICkit 2 Select this option to power the target from the PICkit 2 VDD pin The VDD voltage is set by the VDD PICkit 2 Voltage box in the main application window When powering a target from PICkit 2 ensure the USB power source provides sufficient Voltage and current for programming the device Depending on the power source used PICkit 2 may not be able to provide the desired VDD Voltage to the target The maximum VDD the PICkit 2 can output is about 200 to 300mV below the USB power source voltage Target current and capacitance limitations are the same using Programmer To Go as for USB operation A maximum of 25mA is available to power the target and target capacitance must not slow the VDD rise time to longer than 500us Note Ifthe Low Voltage Row Erase method is used with a target device code protected devices cannot be programmed Programming a protected device requires a Bulk Erase operation at or above the given VDD threshold If all Programmer Settings shown in the dialog are appropriate click Next gt 4 2 2 Download to PICkit 2 Screen This screen provides a summary of the settings from the previous screen and indicates whether or not Tools gt Fast Programming and Programmer gt Hold Device in Reset are enabled For most situations both these options should be enabled 2008 Microchip Technology Inc Page 10 of 14 PICkit
Download Pdf Manuals
Related Search