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STK200 schematics family such as a 74FHC573 if you go beyond 4 MHz. You can also program an extra wait state, to use slower memory. Here you will find a pdf file showing the STK200 schematics: [Hidden Content] If you use a 32 KB SRAM, then connect the /CS signal to A15 which give to the range of &H0000 to &H7FFF, if you use a 64 KB SRAM, then tie /CS to GND, so the RAM is selected all the time. from : BASCOM AVR (MCS Electronic)
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USB ASP Downloader for ATMega For programming the AVR microcontrollers, Atmel has provided special software that can be downloaded from the Atmel website. Software is AVRStudio. This software uses assembly language as the language of instrumentality. AVRStudio addition, there are some third party software that can be used to create programs on the AVR. These third-party software using high level programming language like C, Java, or Basic. To make removal from the computer into a chip, can be used several ways such as using JTAG cable or using artificial Atmel STK. However, you also can use the schematic circuit above to make a downloader ATMega microcontrollers based USB ports. Here is my USB downloader which I successfully created. Imade the USB ASP Downloader based ATMega8. hopefully can help you. Schematic circuit of USB ASP Downloader
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atmega128 ATMEGA 128 (AVR) is a microcontroller that has been equipped for 4Kbyte in its chip EEPROM. EEPROM is separate from the AVR flash memory, and can be written, read per byte. To be able to access the EEPROM it needs to manage registers and fuse bit. To prevent errors in the writing and reading of EEPROM cultivated power supply that is used quite stable. When reading the EEPROM microcontroller stops during the four clock cycles before doing the next command, and to write EEPROM microcontroller’s clock stopped during the second cycle before doing the next command.
