This cable is necessary for the first time program loading into the FLASH memory of the PXA270/PXA255 DIMM Modules and microPC Boards as well as the further on-chip debugging. We recommend every developer to have one in case a part of the memory with bootloader is erased. The cable is connected by one end to the 20-pin JTAG header of a board and by the other end to the computer LPT port. The cable is used together with JflashMM program, designed for implementing the basic software, in our case ArmBoot.

CHARACTERISTICS OF JTAG CABLE CONNECTOR PINS:

Pin     Description     Pin     Description
1           VCC3            2           VCC3
3           -TRST            4           GND
5             TDI             6            GND
7             TMS            8            GND
9             TCK           10           GND
11          RTCK          12           GND
13           TDO          14           GND
15         -SRST          16           GND
17         DBGRQ        18           GND
19        DBGACK       20           GND

For the detailed specification, datasheets, software and more, please visit the Downloads section.