Nuvoton 8051 ISP Programmer
Contents
1. 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 10 NUVOTON 8051 ISP Programmer SS 2 6 Type 6 Connection P4 7 Used for Booting from LDROM In this type of connection P4 7 is to be pulled low to let the 8051 MCU boot from LDROM after hardware reset The PL pin in the ISP interface can automatically pull low P4 7 when the ISP Programmer is connected to the 8051 MCU So the user needn t always pull low P4 7 in the target system The following figures show the hardware connection for With Reset Control and Without Reset Control configuration The former is adopted when the 8051 MCU s RST pin can be controlled by the ISP Programmer the latter is adopted when the 8051 MCU s RST pin cannot be controlled by the ISP Programmer Refer to Section 5 Reset Control With Reset Control 8051 MCU Nuvoton 8051 ISP Programmer Without Reset Control 8051 MCU ISP Interface Nuvoton 8051 ISP Programmer 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 11 NUVOTON 8051 ISP Programmer EE 2 7 Requirement on the XTAL Frequency There is not any restriction on the XTAL frequency for ISP operation All frequencies between 2MHz and 40MHz are acceptable The MCU will automatically build a proper transmission rate to communicate with the ISP Programmer during ISP operation 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 12. 3 3 Auto Synchronization of APROM DataFlash Butter 16 SSC MR Kelte ee CERI oa E E OT 17 EIER 18 NDI ETC ele EE 18 4 2 Download Programmer Mode onannnnennnnennnnennoennenenrnnrrrrsrrrnsnrrsrrrrrrrrsnrrrsnrrrnnrrnsnrnsrrrnsnrrrenrrneneene 18 Ao 111 elle EE 19 5 Reset Control ssessoessensernerresrrerrrrrerrrsrrerrrrrrnrrrrrareerrorrrnrrarronrrnrrnnrorernrrenrr reee 20 51 EENEG 21 5 2 Without Reset Contool EE 21 6 Notes for the ISP Funchon 22 6 1 Reguirement on Oa Il cincasnensascinaninnansnoniasnmiaionncluamasalmaaebinevbiubikeandawninVonmsaansabonshidbedatbinanauiabapabaskide 22 Ce FDOT Te 1S OCS EEN 22 Co COPC WIM TMC ee 23 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 2 NUVOTON 8051 ISP Programmer Revision History v1 00 The first formal released version 2009 07 08 1 Re organize the function buttons on the GUI The function of Auto is combined with Update 8051 v2 00 2009 09 03 2 The data in Code Buffer are refreshed when the button Update 8051 or Verify 8051 is clicked 1 Update the picture of the ISP Programmer Section 1 2 Change the display of part numbers W78E051D W78E052D and W78E054D to v2 01 W78E 1 051D W78E I 052D and W78E 1 054D respectively 3 Fix a minor bug in Nuvoton standard ISP code The ISP code version is changed to v0201 v3 00 Add new parts W925EP01 N78E366A N78E055A N78E
3. Step 4 Now the 8051 MCU will boot from LDROM and start to run the ISP code for ISP operation Note Step 3 shows the Without Reset Control is somewhat inconvenient for the user to have the 8051 MCU boot from LDROM That is why we strongly recommend the user to adopt the With Reset Control configuration 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 21 NUVOTON 8051 ISP Programmer SS 6 Notes for the ISP Function 6 1 Requirement on P3 1 During ISP operation the 8051 MCU s P3 1 behaves as DTA serial data When ISP is not requested P3 1 can function as its normal general purpose I O pin as long as P3 1 conforms to the following requirements The state of P3 1 must be logic 1 before the MCU is just released from reset condition During the ISP operation P3 1 cannot be pulled low by the other components connected to it It is because when the MCU boots from its LDROM and starts to run the Nuvoton standard ISP code the MCU will sample P3 1 to determine the next action If logic O is sampled it means the ISP Programmer is connected and the MCU will stay in LDROM for further ISP operation if logic 1 is sampled the MCU will automatically re boot from APROM by internal software reset to run the user s application code During the operating of ISP P3 1 functions as bi directional I O for serial data transfer It may output logic 1 or logic O to the ISP Programmer a
4. 516A etc The following sub sections will show the connection diagrams for these connection types UO Pins and CONFIG Bit for Booting from LDROM after Reset I O Pins Tied to Ground for CONFIG Setting for Booting from LDROM Booting from LDROM SOnnECHON LYDE CBS W78E 1 051D Weisen Not Need Type 1 W78E 1 054D Selected as LDROM i tb e P2 6 amp P2 7 for 40 pin package Not Need Type 2 W78E L 365A W78E065A W78E858A P4 3 for 44 pin package Not Need Type 3 Reboot P2 6 P2 7 Enabled P2 6 amp P2 7 for 40 pin package Type 2 Reboot P4 3 Enabled W79E217A pe Reboot P3 6 P3 7 f W79E225A P3 6 amp P3 7 for 44 pin package Enabl d Type 4 W79E226A e 7 W79E227A P4 3 PAS for 48 100 pin package 48 100 pin PAS for 48 100 pin package peo Type 3 Reboot P4 0 Reboot P4 7 N78E366A N78E055A P4 3 for 44 68 100 pin package Type 3 CBS Not Need Type 1 N78E059A N78E517A Selected as LDROM 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 5 NUVOTON 8051 ISP Programmer Sooo 2 1 Type 1 Connection No I O Pins Used for Booting from LDROM In this type of connection the PL pin of the ISP interface is not used The following figures show the hardware connection for With Reset Control and Without Reset Control configuration The former is adopted when the 8051 MCU s RST pin can be controlled by the IS
5. 8051 ISP Programmer SS 1 Introduction ISP is the acronym of In System Programming which makes it possible that the user can update the MCU s program memory under the software control without removing the mounted MCU chip from the actual end product The USB stick like tool 8051 ISP Programmer as shown in the following picture is used to perform the ISP function when the MCU s LDROM is pre programmed with the Nuvoton Standard ISP Code and CONFIG bits are properly configured In addition since this tool can save the programming data downloaded from the host it is able to perform the off line operation This feature is especially useful in the field without a host PC Note The ISP function can work only when the ISP code has resided in MCU s LDROM To let users easily use the ISP function some of the 8051 MCU products have the Nuvoton Standard ISP Code pre programmed in LDROM and CONFIG bits properly configured before shipping Please contact Nuvoton for detailed product information The Nuvoton Standard ISP Code Is also included in the folder 4 Nuvoton Standard ISP Code The user may program it by himself using a universal programmer Picture of the 8051 ISP Programmer ISP Key For off line operation press to do Update Chip y ae A is pod ge ZE OE 2 j ery a AF Sak WE r ES Le Bs S e E e EE SANN a nuvoTon ISP Programmer Green Red LEDs To show PASS FAIL ISP Interface a P
6. 0 E lt Revision 5 31 gt 15 NUVOTON 8051 ISP Programmer 3 3 Auto Synchronization of APROM DataFlash Buffer The buffer contents will be automatically synchronized with the physical file in the hard disk when the function button Download Programmer Update Chip or Verify Chip is clicked as shown below So the user needn t manually reload the files for APROM buffer and DataFlash buffer when the physical files are updated externally Nuvoton ISP ICP Utility v5 02 MUVOTOCN Programmer Type Part No ISP C ICP IT Gang ad Fil Update Chip C ISP by COM Port N78E055A y E Download Venty ene rt Programmer APROM items to be Updated rm APROM These function buttons will Programmer Read make the buffers synchronized _ formation CONFIG DataFlash l i CONFIG Setting Exit File Name D tmp 8051 ISP Programmer g test pattern test Green16k bin Code Size 16384 Bytes ae eS Physical file in Checksum 0x4FB5 the hard disk Ready 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 16 NUVOTON 8051 ISP Programmer 3 4 Tool Project File TPJ The user may save all the GUI setting to the Tool Project TPJ file and retrieve the GUI setting by loading the TPJ file previously saved It is much helpful to the user to manage a variety of the programming data by a project style Note This feature is supported from revision v5
7. 05 Nuvyoton ISP ICP Utility v5 05 NUVOTON Programmer Type Hart No Load File W78E N0540 X i 0 Load Save 7 Proj Proj Save GUI setting to a TPJ file pa i Restore GUI setting _CONFIG Setting ee ew from a TPJ file APROM Buffer File Name Code Size Checksum Ready 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 17 NUVOTON 8051 ISP Programmer 4 Operation Modes 4 1 On line Mode The system diagram for On line Mode is shown below In this mode both the host and 8051 MCU are connected The user may directly update the 8051 MCU or download the programming data into the ISP Programmer for using in the Off line Mode After updating the 8051 MCU the user may disconnect the ISP Programmer to let the 8051 MCU run the new application code 8051 MCU C ISP Key nuvoTon ISP Programmer 4 2 Download Programmer Mode The system diagram for Download Programmer Mode is shown below In this mode only the host is connected The user may download the programming data into the ISP Programmer for using in the Off line Mode Nuvoton 8051 ISP Programmer USB Port 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 18 NUVOTON 8051 ISP Programmer 4 3 Off line Mode The system diagram for Off line Mode is shown below In this mode only the 8051 MCU is connected This mode is especially useful in the f
8. 059A and N78E517A 2010 02 10 v4 00 Update the PC site AP version to v4 00 2010 04 01 1 Fix a minor bug in Nuvoton standard ISP code for W925EP01 N78E366A N78E055A N78E059A and N78E517A The ISP code version is updated to v3 12 2 Update the PC site AP version to v4 01 1 Improve data security of the Nuvoton standard ISP code for N78E366A N78E055A N78E059A and N78E517A The ISP code version is updated to v3 13 2 Update the connection diagrams of Type 1 6 Section 2 1 2 6 3 Add new sections Section 2 7 Section 6 2 and Section 6 3 4 Update the PC site AP to v5 00 The GUI display for CONFIG Setting becomes more user friendly 2009 09 22 v4 01 2010 06 15 v5 00 2010 08 13 1 Fix the HEX to BIN conversion error when the hex input file has a binary code size more than 64K The application program is updated to v5 02 2 Modify all the ISP codes to prevent from hanging in LDROM during powered on in an RS 485 application The ISP code version is updated to v3 20 1 Support Tool Project TPJ file for management of GUI setting 2 Fix the ISP code bug when using 3 6864MHz XTAL for ISP by COM Port function The ISP code version is updated to v3 21 1 Fix some software bugs 2 The ISP code version is updated to v3 23 2011 04 08 v5 02 2010 11 15 v3 05 2011 01 18 lt O1 esch 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt J NUVOTON
9. 2 NUVOTO 8051 ISP Programmer OC EEO 3 Software 3 1 Install the Driver This ISP Programmer has the USB to Serial bridge chip PL 2303 built inside When connected to host it will appear as a USB to Serial COM port in the System Hardware Device Manager Before starting to use this programmer the user needs to install the driver in the host if the PL 2303 driver has never been installed in this host The user can also find this driver in the folder 1 Driver Note Don t plug the ISP Programmer to the host before the driver is installed 3 2 Install the Application Program The application program setup file is contained in the folder 2 Application Program Using the default installation setting you will find the item Nuvoton Tools Nuvoton ISP ICP Utility v appearing in the Windows START menu after the application program is successfully installed Note ISP ICP means this application program is designed for both the ISP Programmer and the ICP Programmer 3 2 1 Main GUI for the Application Program Select ISP Load file for APROM buffer for the ISP Programmer Select wanted Part No and DataFlash buffer See Note Gal Nuvoton ISP ICP Utility v5 02 EI K en tr Two things included NUVOTON r 1 Download Programmer 2 Update the MCU chip Programmer Type Part No C ISP by COM Port N78E055A e APERE WIN UO GOOG I0AGBO Download Verify in the APROM buffer Programmer APRO
10. 31 gt 7 NUVOTON 8051 ISP Programmer SS 2 3 Type 3 Connection P4 3 Used for Booting from LDROM In this type of connection P4 3 is to be pulled low to let the 8051 MCU boot from LDROM after hardware reset The PL pin in the ISP interface can automatically pull low P4 3 when the ISP Programmer is connected to the 8051 MCU So the user needn t always pull low P4 3 in the target system The following figures show the hardware connection for With Reset Control and Without Reset Control configuration The former is adopted when the 8051 MCU s RST pin can be controlled by the ISP Programmer the latter is adopted when the 8051 MCU s RST pin cannot be controlled by the ISP Programmer Refer to Section 5 Reset Control With Reset Control 8051 MCU Nuvoton 8051 ISP Programmer Without Reset Control 8051 MCU ISP Interface Nuvoton 8051 ISP Programmer 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 8 NUVOTON 8051 ISP Programmer Sooo 2 4 _Type 4 Connection P3 6 amp P3 7 Used for Booting from LDROM In this type of connection P3 6 and P3 7 are to be pulled low to let the 8051 MCU boot from LDROM after hardware reset The PL pin in the ISP interface can automatically pull low P3 6 and P3 7 when the ISP Programmer is connected to the 8051 MCU So the user needn t always pull low P3 6 and P3 7 in the target system The following figures show the hardware connection for With Rese
11. M Select items to be Updated Programmer Read l Show the MCU chip s updated items iv APROM Set CONFIG bits _Information CONFIG CONFIG setting when DataFlash Update Chip e is clicked Click to show APROM Buffer DataFlash Buffer Download the current GUI s setting prin E into the Programmer Click to show Show the DataFlash buffer programming data downloaded in the Programmer File Name D tmp g051 ISP Programmer g test pattern test Green16k bin Information of Code Size 16384 Bytes the loaded file Checksum 0x4FB5 Processing Ready The COM port to which status the programmer is to be connected Note To load code file click APROM Buffer then click Load File To load data file click DataFlash Buffer then click Load File 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 13 NUVOTON 8051 ISP Programmer Lem 3 2 2 GUI for CONFIG Setting For some 8051 MCU parts such as N78E866A N78E055A N78E059A and N78E517A the CONFIG bits can be updated by the ISP Programmer as shown below CONFIG Setting LOCK Code Protection Glock Source C Disable e External XTAL Enable C Internal OSC Boot Select External XTAL P CAM gt 4MHz Boot from LDROM C lt 24MHz 6T Mode Internal OSC Disable 12T mode e C Enable 6T mode Cc Watch dog Timer Clock Filter Disabled after reset Enable C Enabled after reset C Disable Brownout Det
12. NUVOTON 8051 ISP Programmer ao CE eee Nuvoton 8051 ISP Programmer User Manual Revision 5 31 2011 04 08 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 1 NUVOTON 8051 ISP Programmer E Contents Revision HIStOTY sesjvicxsnccciedsnccsesasncenecesnaeexeodeeeyed ycecnenacsqeevateraedanesesecedsendaeceandescwadesaesks ss 3 1 Inte ele e seare E E EAE E 4 ELLO VUE 5 2 1 Type 1 Connection No I O Pins Used for Booting from LDROM ssssssssssesssssssensnnrrssssrnrrrresrnnenee 6 2 2 Type 2 Connection P2 6 amp P2 7 Used for Booting from LDROM s sssesssssssssessresssnrrnsrrreesrrrresne 7 2 3 Type 3 Connection P4 3 Used for Booting from LDROM ccccccseeceeeseeeeeeeeeeeeeseeeeeeeseaeeeens 8 2 4 Type 4 Connection P3 6 amp P3 7 Used for Booting from LDROM s ss ssssssssssessresssnrrsssrrrresrrrresne 9 2 5 Type 5 Connection P4 0 Used for Booting from LDROM ssannnannnnannnsnnnnnnnnnennnnnnnnnnrnnsnnrennene 10 2 6 Type 6 Connection P4 7 Used for Booting from LDROM ssannssennnnannnsennnnnnnnennnnnnnnsnrrnsnnreenene 11 2 Requirement on the XTAL Freouency 12 eege 13 Set WS eM Ui DIVET ea E E 13 3 2 I stall the Application Program WEE 13 3 2 1 Main GUI for the Application Program cccccccccccccssesseeeceeeeeceeeeseeeeeeeseeeseeeeeeeessuaeaeeeeeeeessuaaaseseeeees 13 32 2 GUNO CONFIG SENG WEE 14 3 2 3 GUI for Programmer Information WE 15
13. P Programmer the latter is adopted when the 8051 MCU s RST pin cannot be controlled by the ISP Programmer Refer to Section 5 Reset Control With Reset Control 8051 MCU Nuvoton 8051 ISP Programmer Without Reset Control 8051 MCU Nuvoton 8051 ISP Programmer C ISP Key nuvoTon ISP Programmer 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 6 NUVOTON 8051 ISP Programmer ES 2 2 Type 2 Connection P2 6 amp P2 7 Used for Booting from LDROM In this type of connection P2 6 and P2 7 are to be pulled low to let the 8051 MCU boot from LDROM after hardware reset The PL pin in the ISP interface can automatically pull low P2 6 and P2 7 when the ISP Programmer is connected to the 8051 MCU So the user needn t always pull low P2 6 and P2 7 in the target system The following figures show the hardware connection for With Reset Contro and Without Reset Contro configuration The former is adopted when the 8051 MCU s RST pin can be controlled by the ISP Programmer the latter is adopted when the 8051 MCU s RST pin cannot be controlled by the ISP Programmer Refer to Section 5 Reset Control With Reset Control 8051 MCU ISP Interface Expanding Adaptor Nuvoton 8051 ISP Programmer C ISP Key nuvoTon ISP Programmer Without Reset Control 8051 MCU Expanding Adaptor Nuvoton 8051 ISP Programmer 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5
14. ection Enable Voltage Reset C Disable 45V s Enable C 3 8V C Disable C Fc je 22V DataFlash S Size 4 KB Se Ena Start Address OxF000 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 14 NUVOTON 8051 ISP Programmer ES 3 2 3 GUI for Programmer Information To check the programming data downloaded in the Programmer click the Programmer Information button when the Programmer is connected to PC Note the CONFIG Setting dialog box appears only when the CONFIG bits are to be updated Downloaded CONFIG setting Programmer Information CONFIG Setting lt lt lt Programmer Type 051 ISP Programmer gt gt gt Part Mo N7SEO055A ttt Downloaded code file for APROM File Name test Green 16k bin Code Size 16384 Bytes EndAddr 0x3FFF Checksum Ox4FBS LOCK Code Protection Clock Source C External XTAL Enable C Inte Boot Select External XTAL A gt 24MHz e Boot fom LDROM be 6T Mode Internal OSC Downloaded data file for DataFlash_ Disable 12T mode File Name OOFF Ak bin 4096 Bytes EndAddr 0x0FFF Checksum OxF S00 Data Size 2010 Nuvoton Technology Corporation All Rights Reserved C Watch dog Timer Disabled after reset er j Brownout Detection Enable Voltage EE e 2 E DataFlash e Clock Filter e Enable r Reset Enable C C Size 4KB H del at Start Address xF00
15. ield without the host After the ISP Programmer has been downloaded it can perform the off line operation Press the ISP Key to trigger an ISP operation to update the 8051 MCU After updating the 8051 MCU the user may disconnect the ISP Programmer to let the 8051 MCU run the new application code 8051 MCU 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 19 NUVOTON 8051 ISP Programmer SS 5 Reset Control Normally the 8051 MCU s RST pin with external RC reset circuit see Figure 5a can be controlled by the ISP Programmer At this time the user may adopt the With Reset Contro configuration for ISP operation However the RST pin cannot be controlled by the ISP Programmer when the RST pin is connected to a reset IC such as MAX810 ADM810 AlC810 and FP6810 etc see Figure 5b Now the user should adopt the Without Reset Contro configuration for ISP operation External RC Reset Circuit The general external RC reset circuit is shown in Figure 5a The resistance of R should be larger than 47K Q to have the RST pin be successfully controlled by the ISP Programmer Normally 47KQ 2 2uF and 100KQ 1uF are recommended for R C Figure 5a External RC Reset Circuit 8051 MCU External RC reset circuit Reset Circuit with a Reset IC In this condition the RST pin cannot be controlled by the ISP Programmer Figure 5b Reset Circuit with a Reset IC 8051 MCU Reset IC acti
16. in 5 PL Pulllow control Pin 4 RST Reset control to 8051 MCU Pin 3 VOC Power supply from target system Pin 2 DTA Serial data to from 8051 MCU Pin 1 GND Ground The ISP Interface PL Pull low control Some 8051 MCU parts need its special I O pins to be tied to ground to boot from LDROM for ISP operation Using pull low control can release these I O pins for their normal function In other words these pins needn t be tied to ground in the target system but pulled low by the ISP Programmer for ISP operation RST Reset control to the 8051 MCU The ISP Programmer will send reset signal to control the 8051 MCU for ISP operation VCC Power supply from the target system In off line operation the Programmer is powered by the target system DTA Serial data to from the 8051 MCU Single wire Communication Interface GND Ground 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 4 NUVOTON 8051 ISP Programmer 2 Hardware According to the I O pins used for booting from LDROM after reset there are several connection types between the 8051 MCU and the ISP Programmer as shown in the following table Some parts don t need any I O pins but need CONFIG to be properly configured such as W78E I 051D W78E I 052D and W78E I 054D Some parts need only UO pins such as W78E 1 058D W78E I 516D etc Some parts need not only I O pins but also CONFIG properly configured such W78E I RD2A W77E L
17. nd receive logic 1 or logic 0 from the ISP Programmer Thus the user should check if there is any side effect on the other components connected to P3 1 during ISP operation The following flow chart shows how the MCU determines to cooperate with ISP Programmer or to reboot from APROM when the MCU starts to run the Nuvoton standard ISP code in LDROM Start MCU boots from LDROM Keep running in LDROM and Es Check if P3 1 0 cooperate with the ISP Programmer MCU re boots from APROM to run the user s application code 6 2 About the ISP Code For the 8051 MCU products with ISP function there are two program memories one is APROM and the other is LDROM APROM contains the user s application code for normal operation while LDROM contains the ISP code cooperating with the ISP Programmer for updating of APROM To use the ISP Programmer to update APROM the ISP code should always reside in LDROM If the ISP code disappears from LDROM because of accidentally being erased by a universal programmer the ISP function will become always failed To recover the ISP function please use a universal programmer to program the Nuvoton standard ISP code into LDROM and have its CONFIG setting properly configured cf Section 2 Why is the ISP code easily accidentally erased by a universal programmer Because the LDROM is also erased along with the APROM if the user uses a universal programmer to program APROM So we strongly recommend the user
18. t Contro and Without Reset Contro configuration The former is adopted when the 8051 MCU s RST pin can be controlled by the ISP Programmer the latter is adopted when the 8051 MCU s RST pin cannot be controlled by the ISP Programmer Refer to Section 5 Reset Control With Reset Control 8051 MCU ISP Interface Expanding Adaptor Nuvoton 8051 ISP Programmer C ISP Key nuvoTon ISP Programmer Without Reset Control 8051 MCU Expanding Adaptor Nuvoton 8051 ISP Programmer 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 9 NUVOTON 8051 ISP Programmer SS 2 5 Type 5 Connection P4 0 Used for Booting from LDROM In this type of connection P4 0 is to be pulled low to let the 8051 MCU boot from LDROM after hardware reset The PL pin in the ISP interface can automatically pull low P4 0 when the ISP Programmer is connected to the 8051 MCU So the user needn t always pull low P4 0 in the target system The following figures show the hardware connection for With Reset Control and Without Reset Control configuration The former is adopted when the 8051 MCU s RST pin can be controlled by the ISP Programmer the latter is adopted when the 8051 MCU s RST pin cannot be controlled by the ISP Programmer Refer to Section 5 Reset Control With Reset Control 8051 MCU Nuvoton 8051 ISP Programmer Without Reset Control 8051 MCU ISP Interface Nuvoton 8051 ISP Programmer
19. to use the ISP Programmer to program APROM in the beginning of getting the MCU sample with ISP code inside Don t use any universal programmer to program APROM unless the ISP function won t be used 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 22 NUVOTON 8051 ISP Programmer OoOo O n 6 3 Compared with the ICP The difference between ISP In System Programming and ICP In Circuit Programming is that ISP is implemented by software control of MCU itself while ICP is implemented by hardware control So before updating the MCU chip ISP needs a software code the ISP code pre programmed in MCU s LDROM to function as software control while ICP doesn t need any software code pre programmed 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 23
20. ve High 2010 Nuvoton Technology Corporation All Rights Reserved lt Revision 5 31 gt 20 NUVOTON 8051 ISP Programmer SS 5 1 With Reset Control For the With Reset Control configuration the ISP Programmer will always keep the 8051 MCU in reset state until the ISP operation is triggered such as Update Chip button is clicked or ISP Key is pressed At this time the ISP Programmer will release the 8051 MCU to let it reboot from LDROM to run the ISP code After ISP operation is completed the ISP Programmer keeps the 8051 MCU in reset state again When the ISP Programmer is disconnected from the 8051 MCU the 8051 MCU will automatically reboot from APROM to run the new application code With reset control the user may do the ISP operation as long as the ISP Programmer is connected to 8051 MCU when the 8051 MCU is in powered on state Note With Reset Control is strongly recommended for ISP operation 5 2 Without Reset Control For the Without Reset Contro configuration to successfully let the 8051 MCU boot from LDROM to run the ISP code the user should follow the steps listed below Step 1 Connect the ISP Programmer to the 8051 MCU Step 2 Connect the ISP Programmer to the host This step is only for On line Mode and may be exchanged with Step 1 Step 3 Make the 8051 MCU boot from LDROM by the following two methods 1 Send reset a reset pulse to the RST pin or 2 power off the and power on again
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