Abatron's BDM interfaces with the Access option consist of a 1000, 2000 or 3000 BDM unit plus a library of C calls executable on a PC which control the BDM/JTAG for users who wish to write their own test or loading procedures.  The API is extensive, including accessing memory and CPU registers.  Algorithms are supplied for programming on chip flash, EEPROM and most external flash parts as well.

By controlling the target CPU via the BDM/JTAG it is possible to read and write to registers and hence to control I/O.  This allows a full system test to be developed including hardware calibration if required and serialisation values to be written into the flash or EEPROM.