On the ARM-USB-TINY, VREF, and VTARGET are internally connected, and all the GND lines (even numbered pins, from 4 to 20) share the same line as well, so they can be used to split VCC/GND between the voltage source and the target. The following setup can then be used to flash a BIOS chip through SPI. The ARM-USB-TINY-H (15BA:002A) and ARM-USB-OCD-H (15BA:002B) should also work, though they are currently untested. The Olimex ARM-USB-TINY (VID:PID 15BA:0004) and ARM-USB-OCD (15BA:0003) can be used with flashrom for programming SPI chips. Olimex ARM-USB-TINY/-H and ARM-USB-OCD/-H

The user-space source code is part of flashrom, the schematics and PCB layouts are licensed under the CC-BY-SA 3.0 license and were created using the open-source Kicad EDA suite (GPL, version 2).įor more information and downloads, including a parts list, Gerber file downloads, recommended Kicad settings, and recommended PCB manufacturer settings, see. It uses an FTDI FT2232H chip and features either a DIP-8 socket or a pinheader where jumper-wires can be attached. Openbiosprog-spi is an Open Hardware USB-based programmer for SPI chips, designed by Uwe Hermann. The FTDI FT4232H Mini-Module Evaluation Kit ( datasheet) can be used with flashrom for programming SPI chips. The FTDI FT2232H Mini-Module Evaluation Kit ( datasheet) can be used with flashrom for programming SPI chips. On older flashrom versions the syntax was: You have to invoke flashrom with the following parameters:

All GND pins should be connected together ( pins 1 and 10 on the DLP-USB1232H, pin 8 on the SPI chip, pin 1 on the voltage regulator).

The WP# and HOLD# pins should be tied to VCC! If you leave them unconnected you'll likely experience strange issues.

Connect the following pins from the DLP-USB1232H to the SPI BIOS chip:.

100nF and 10uF as per datasheets, but using two 10uF capacitors, or even two 47uF capacitors also works in practice) as shown in the schematics, otherwise the voltage regulator will not work correctly and reliably.

You have to connect two capacitors (e.g.

For usage on a breadboard the TO-220 packaging is probably most useful.

You can probably use pretty much any 3.3V voltage regulator, e.g.

You need a 3.3V voltage regulator to convert the 5V from USB to 3.3V, so you can power the 3.3V SPI BIOS chip.

Without this connection it will not be powered, and thus not be detected by your OS (e.g.

You must connect/shorten pins 8 and 9, which configures the device to be powered by USB.

This is the chip you want to program/read/erase. See the schematics for details (you can also download the schematics as PDF for easier printing).

In order to use the DLP-USB1232H device as SPI programmer you have to setup a small circuit (e.g. DLP-USB1232H based SPI programmer schematics

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