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  Modifying Xilinx ML605 for Direct JTAG Access

 

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©1989-2021 Lauterbach GmbH

Using ML605 without USB-JTAG Bridge

While the board is modified for use via a JTAG connector, the USB-JTAG bridge is not functional. This is not 
a problem for TRACE32 because it uses the JTAG connector. 

For using the Xilinx tools (iMPACT, ChipScope, ...) you can either use a Xilinx Platform Cable connecting to 
JTAG (e.g. Xilinx Platform Cable USB) or alternatively use the TRACE32 debug interface as backend for the 
Xilinx tools. The latter avoids constantly swapping the cable at the JTAG port when switching between 
debugging and configuration.

For doing 

JTAG accesses with the Xilinx platform cable

, you can use the adaptor “JTAG Converter to 

Xilinx Target Adapter 14” (LA-3731) which is included with TRACE32 for MicroBlaze, the adaptor “JTAG to 
Xilinx ML605”, and a 16-wire ribbon cable as shown in the image below.

For information on setting up the Xilinx tools for using the TRACE32 debug interface for JTAG access, 
please refer to the application note “Using TRACE32 as backend for Xilinx tools”.

Summary of Contents for ML605

Page 1: ...RACE32 Documents ICD In Circuit Debugger Processor Architecture Manuals MicroBlaze Application Notes for MicroBlaze Modifying Xilinx ML605 for Direct JTAG Access 1 Introduction 2 Requirements 2 Descri...

Page 2: ...there is no guarantee whatsoever In particular be aware that soldering may cause permanent damage to the board Requirements The following items are used for accessing the JTAG signals on ML605 EVB Xil...

Page 3: ...corner of the FMC LPC connector 2 Disable the driver U88 SN74LV541APWR so that the debugger can drive the signals U88 is located at the back side in the north west quadrant of the board The driver is...

Page 4: ...ay be difficult to repair especially if the pad is also torn off An improvised cable anchorage with a knot of the cable in a hole besides the FMC LPC connector was found useful for preventing this Tar...

Page 5: ...umber of JTAG devices BYPASS registers 2 IDCODE of device 0 is 0x0a001093 Xilinx XILINX System ACE controller SYS CONFIG DRPOST 0 SYS CONFIG DRPRE 1 SYS CONFIG IRPOST 0 SYS CONFIG IRPRE 10 IRWIDTH 8 I...

Page 6: ...y use the TRACE32 debug interface as backend for the Xilinx tools The latter avoids constantly swapping the cable at the JTAG port when switching between debugging and configuration For doing JTAG acc...

Page 7: ...however needs to be at the beginning and the end of the JTAG chain to drive the signals Therefore the adaptor connects its TDI line to the TDO signal of the HW FMC 105 DEBUG board The additional TDO...

Page 8: ...itional information on miscellaneous topics The schematics of the EVB Xilinx ML605 are available from http www xilinx com support documentation boards_and_kits xtp052_ml605_schematics pdf The jumper J...

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