![]() Invoking flashrom: You first need to add the -p ft2232spi option, and then specify one of arm-usb-tiny, arm-usb-tiny-h, arm-usb-ocd or arm-usb-ocd-f for the type. The voltage source should provide 3.0V to 3.3V DC but doesn't have to come from USB: it can be as simple as two AA or AAA batteries placed in serial (2 x 1.5V). Pin (JTAG Name) SPI/Voltage Source 1 (VREF) VCC (from Voltage Source) 2 (VTARGET) VCC (to SPI target) 4 (GND) GND (from Voltage Source) 5 (TDI) SI 6 (GND) GND (to SPI target) 7 (TMS) CE# 9 (TCK) SCK 13 (TDO) SO 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.
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