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A simple breakout board + USB-JTAG interface for an ARM based processor I have had for two years but been unable to use. Intended to work like an Arduino board so far as plugging and playing with other boards. Care must be taken to not use power down or battery features of the processor and to not make the JTAG chain inaccessible to the Cyprus chip - at least one GPIO line will be needed of the 4 used to create the JTAG chain to signal "reset to JTAG please".