J-Link vs. I-jet The I-jet, which is limited only for use with the IAR Embedded Workbench for ARM, pales in comparison to the J-Link’s flash programming speed. As can be seen, it is six times slower than the SEGGER J-Link. LibMPSSE-I2C (Recommended) FTDI have produced a newly updated library to handle all the MPSSE commands necessary to interface to a device using the I2C protocol. A separate page has been created where the LibMPSSE library can be downloaded, along with code examples and release notes. Embedded Studio PROHigh-end IDE bundled with professionalRTOS and middleware components.Start programming your application immediately and rely on support by the Embedded Experts!