OCDS
OCDS is the abbreviation for on chip debug system and is used in modern microprocessors and controllers to facilitate troubleshooting in hardware and software.
OCDS is addressed via an extended JTAG interface, whereby the connection between the actual debugger and the processor is established via a so-called link. This can e.g. B. exist in a so-called wiggler , which connects the JTAG interface with the printer or USB port of a PC.
The great advantage of OCDS over older systems for testing hardware-related programming (e.g. special bond-out versions of chips or special emulation chips instead of the processor) is primarily that the debug system can be used in prototyping as well as in the release versions of the hardware. Thus, in addition to troubleshooting in finished series devices z. B. programming of non-volatile memory via OCDS is also possible.