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In your journey hacking, modding and making electronics you will bump into many a FLASH chip. Often times these store program memory, settings, data files etc. Some microcontrollers have built-in flash, but an external flash chip allows for field-updating. Also, fitting a large Flash chip inside a micro or FPGA can increase cost a lot, where-as having it be external lets the customer pick exactly the right size they need.
They can range from 256 bytes up to 16 MBytes or even more! SPI Flash Standardization The good news is that just about every 8-pin Flash chip has a standard pinout and SPI interface, these tend to have the number 25 somewhere in the beginning of the part number. There are also ones that are only I2C - these will have the number 24 somewhere in the part number. This page is just about SPI flash.
As you can see, SPI flash part numbers tend to start with 'MX25' or 'W25' or 'AT25' or 'SST25' etc. The first two letters are the manufacturer name.
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The rest of the part number will also contain a 3 digit number that indicates the size in 'kilobits' or 'megabits'. 010 is 1-Megabit (128 KByte), 080 is 8-Megabit (1 MByte), 016 is 16-Mbit/2MByte. For smaller sizes, all 3 digits are used. 256 is 256-Kbit (32KByte). Not only do they have a standard pinout, but there is also a standard-ish set of commands you can use to read and write the data.
So, if your flash memory chip has this pinout, chances are you can use a standard command set to program it. If you want to use an microcontroller. If you have an Arduino or compatible, check out our libraries ( or ) on how to read/write to/from these in a mcirocontroller HOWEVER you are here because you do not want to mess with an Arduino - your file that you want to read/write is on your computer, and its big so getting it into a microcontroller is a pain. Instead, in this guide we will use an FT232H as a 'gateway' so that you can use any computer and read/write the SPI flash through the command line. Uncompress the zip folder.
Fable 3 traitors keep dlc pc download. If you are on mac or linux you will need to install the FTDI library and build the executable. For Windows, we provide the.exe already Wiring Because SPI flash chips run at 3.3V, you will need to regulate the 5V supply on the FT232H down. Using the regulator, make the connections shown in the diagram below. Make sure to add a 10uF capacitor from the regulator output to ground for stability! Wire up your FT232H breakout to your flash chip like this (use a socket or an adapter board if it is not a DIP package) • D0 on the FT232H to pin 6 on the flash • D1 on the FT232H to pin 5 on the flash • D2 on the FT232H to pin 2 on the flash • D4 on the FT232H to pin 1 on the flash • pin 3 (Write Protect) on the flash to 3.3V.
If you are only reading from the Flash, you can connect this to ground. • pin 4 (VSS ground) on the flash to ground • pin 7 (HOLD) on the flash to 3.3V • pin 8 (VCC power) on the flash to 3.3v.
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