How to reflash AT91SAM7S256 mcu with jtag?ġ- Remove AT88sc or lift AT88sc Pin4 only before erase the ARM7TDMIĢ- Connect the CarProg clone device to USB cableģ- Connect the Carprog device to jTag deviceĤ- Erase the ARM7TDMI by connect the WIRE Pin (in white circle) at VCC Pinĥ- Config the j-Tag programmer like picturesĦ- If the ARM7TDMI is successfully erased the program can be recognized in ARM7TDMIĨ- Program the carprog device with NEW Flash Fileĩ- After successful programming solder back AT88sc eEprom to the board The programming process is finished!!, disconnect the 12v supply, then disconnect the programmer from carprog, solder the pin 55 wire to Ground (check the picture) and put back the AT88SC eeprom, reassemble the carprog and test it. You can verify again if everything is ok by pressing the button “Verify”: If the progrmming was succefull you will receive the next message: Now press the “Program” button and wait to finish: In “Src File” select the location of the AT91SAM7S256.bin in your hard drive.: In “Dst Addr” select: “Flash Base Address” Go to “4 Programming” in the programming wizzard and press “Check” to verify the communication with the target mcu, if all is ok the values must be: Start the H-FLASHER and select the AT91SAM7S256 from the list Now connect the carprog full to JTag programmer and 12v supply and press “Detect Target” in H-TAG server, now the Carprog Mcu is detected!!!:

Open the H-Jtag server and make the adjustments: Here’s little tutorial on programming and re-flashing mcu AT91SAM7S256 with carprog and jtag (including dump and program download)ģ-carprog programmer ( carprog 7.28 or carprog 8.21 online version)Īfter the H-Jtag sotware is installed we can procced to configure:

Free download jtag pinout