It is necessary to use the HCT type IC in order to make sure the programmer should also work with the 3V type parallel port. The 74HCT367 IC buffer the parallel port signals. Diagrams in datasheets of SPI.įigure 1 shows the circuit diagram of the SPI Flash programmer hardware interface, the power to the interface is provided either by a 9V dc adapter or a 9V battery. Looking at this post from AVRFreaks will provide you with code for some of Atmels AT45xxxx serial flash. (By the way, if you noticed that “11001010” does not equal 0x53 in the above diagram, kudos to your attention to detail. Serial Peripheral Interface (SPI) is an interface bus commonly used to send data between microcontrollers and small peripherals such as shift registers, sensors, and SD cards. Com - Electronic Projects, Electronic Schematics, DIY Electronics.
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