In general, the J-Link DLL comes with a database that defines which devices are supported. SEGGER updates this database regularly but there are occasions when support for a device is not available. In such cases, the Open Flash Loader feature allows this support to be added to the J-Link. The device will be supported in similar fashion as other supported devices. This includes flash download, as well as the unlimited flash breakpoint feature.
This means silicon vendors can implement support for new devices at the early stages of the development process, while end users can connect (Q)SPI flash memories in a non-standard way.
