How does JTAG interface work?
By providing a mechanism to control and monitor all the enabled signals on a device from a four-pin TAP, JTAG significantly reduces the physical access required to test a board. There are two main ways that this boundary scan capability can be used to test a board.
What is Lauterbach TRACE32?
TRACE32 is a software tool that can assist you with real-time debugging of your Arm based system. Arm works closely with Lauterbach to help developers easily debug their applications.
What is Vtref?
VTREF 1 ”Voltage Reference” is the target reference voltage. It indicates if the target power is applied, it is used to create the logic-level reference (VTREF/2) for the debugger input comparators and it auto adjusts the voltage levels of the debugger output driver.
Does JTAG need VREF?
The JTAG-SMT2 uses a 3.3V main power supply and a separate Vref supply to drive the JTAG signals. All JTAG signals use high speed, 24mA, three-state buffers that allow signal voltages from 1.8V to 5V and bus speeds of up to 30MBit/sec.
What is JTAG emulator?
JTAG emulators are the “umbilical cord” between PC software tools and DSP boards during development. When combined with a JTAG emulator, CCS provides crucial board debug and “bring up” capabilities such as single-step, breakpoint, memory and symbol display and “watch”, executable code download, and data file transfer.
What are the signals of the JTAG interface?
This JTAG interface is a superset of IEEE Std 1149.1. TCK, TMS, TDI, TDO, TRST- are the standard JTAG signals. A few more signals are added for advanced debug capabilities. There is an additional, small gold plug on the side of the debug cable case. This signal is not required. It can be used for customer specific solutions.
Is the JTAG debugger trace32-icd Universal?
The Lauterbach product TRACE32-ICD supports a wide range of on-chip debug interfaces. The hardware for the debugger is universal and allows to interface different tar- get processors by simply changing the debug cable and the software. JTAG Debugger System Architecture TRACE32 – Technical Information 2
What kind of device is a JTAG chip?
JTAG is defined as a serial communication protocol and a state machine accessible via a TAP. The DTAB (Debug and Test Access Block) is implemented on the target chip as a “passive” device that never sends data without request. The DTAB mainly consists of the following:
What does it mean to have a Lauterbach API?
Lauterbach ensures backward compatibility of the API. Backward compatibility means, that application built with one release of the API will remain working on both, future versions of the API and future versions of the main TRACE32 software.