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 Opella-XD for MIPS
Ultra-high-speed EJTAG Debug ProbeImage

Advanced features of Opella-XD include:

  • Fast, easy-to-install USB 2.0 High-Speed Interface (480Mb)
  • Supports all popular hardware debug protocols
  • Unique Auto-conditioning Probe provides maximum possible download speed to target with fastest JTAG clock frequencies
  • Hot-plug support allows post-mortem debugging
  • Fast, trouble-free Plug-and-Play installation
  • Small, versatile Target Probe Cable fits on any target board
  • Fast in-target Flash Programming
  • Supports latest EJTAG 4.10 MIPSTM debug protocol
  • Wide target voltage range: 0.9V to 3.6V
  • Versatile Target-Reset and Test-Port-Reset support
  • Works with Windows and Linux hosts
  • Built-in diagnostics instantly show status of Target, Debug Probe and USB link
  • Universal Hardware-Debug platform for all popular target architectures and compilers



Ashling's Opella-XD EJTAG Debug Probe is the fastest available debug probe for embedded development on MIPSTM RISC cores.

Benefits of Opella-XD to the embedded hardware developer:

  • Accelerates the entire embedded-hardware debug process: ultra-fast installation, code download and flash programming saves time at every code rebuild
  • Instantly autoconfigures to target system
  • Long-term investment: works with all popular target architectures and compilers
  • Helps with the most difficult debugging tasks: hardware bring-up, operating-system booting, post-mortem debugging
  • Future-proof: works with latest hardware-debug protocols, all popular host operating-systems
  • Compact, easy-to-install target probe cables support all popular debug interfaces

Opella-XD Probe Specification:

  • High-speed USB2.0 (480Mb/s) interface to host PC or Linux workstation
  • Target EJTAG clock rates up to 100MHz
  • Auto-conditioning for fast EJTAG clock frequencies
  • Sustained code download to target at over 3MB/s (using 100MHz EJTAG clock)
  • Supports all MIPSTM hardware-debug standards: EJTAG 4.10, 3.10, 2.6x, 2.5x, 2.0x and 1.5x
  • 14-way or 20-way IDC target EJTAG connectors
  • Configurable Target-Reset and Test-Port-Reset, under full user control
  • Fine-grained adjustment of JTAG clock frequency from 1KHz to 100MHz
  • Supports target operating voltages from 0.9V to 3.6V. Opella-XD detects and automatically configures for the appropriate target voltage
  • Supports RTCK adaptive clocking of debug data from target (EJTAG 4.10)
  • "Hot-plug" support; allows connection to a running target without resetting or halting
  • Fully powered by USB interface; no external power-supply needed
  • Support for all on-chip hardware breakpoints; unlimited number of software breakpoints
  • Big-endian and little-endian target architectures supported
  • Full support for MIPS16TM/MIPS16eTM code compression


Compiler Support:

All popular MIPSTM C/C++ compilers are supported including GNU GCC, Green Hills Software and WRS/Diab Data and all other ELF/DWARF compliant compilers. See the separate PF-MIPS-XD datasheet.


Ashling's GDB-Server-MIPS software package allows Ashling's Target Debug Probes to be used with the GNU GDB open-source debugger. The Ashling GNU GDB Server is available for Windows and Linux (x86 based) hosts and supports GNU GDB and all Eclipse CDT based debuggers (e.g. MontaVista Devrocket).

Product Order Code
Opella-XD for MIPS Debug Probe. Includes USB 2.0 cable, documentation and diagnostic software Opella-XD-MIPS
14-pin Target Probe Cable with 0.1"-pitch IDC connector for EJTAG versions 2.5 -4.10. Supports target voltages 0.9V to 3.6V TPAOP-MIPS14
Adapter with 20-pin 0.05"-pitch IDC connector for EJTAG versions 1.5x - 2.0x. Used with TPAOP-MIPS-14 Target Probe Cables AD-EJTAG20
PathFinder-XD for MIPS Eclipse-based Source Debugger; supports all popular MIPS compilers. PF-XD-MIPS
GDB-Server for MIPS. Connects GNU GDB open-source debugger to Opella-XD Debug Probe. GDB-Server-MIPS
Ribbon Cable Assembly for use with TPAOP-MIPS14. Useful for target systems with restricted access WC0078

Opella-XD-MIPS Device Support:

MIPS32® 4K™ MIPS32® 24K™ MIPS32® 34K™
MIPS32® 4Kc™ MIPS32® 24KE™ MIPS32® 74K™
MIPS32® 4KEc™ MIPS32® 24KEc™ MIPS32® 1004K™
MIPS32® 4KS™ MIPS32® 4KSD™  
MIPS32® 4KE™ MIPS32® M4K  

MIPS, MIPS16 and MIPS16e are Trademarks of MIPS Technologies, Inc.

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