sample_embedding_folder2/0731297.txt

Ticket Name: TDA2: How many EMU lines of JTAG port are necessary to be connected to access all the processors?

Query Text:
Part Number: TDA2 Due to space-constraint, I am trying to minimize the JTAG connector size. However, I have some doubts on questions below: 1. Is it enough to connect only JTAG and EMU[1:0] to TDA2SG to access all the processors using 14-pins connections? 2. What will be left non-accessible without EMU[4:2]? 3. Is nSRST a must-have connection?

Responses:
CTY Lim said: 1. Is it enough to connect only JTAG and EMU[1:0] to TDA2SG to access all the processors using 14-pins connections? Yes, that would get you the regular jtag support. See the below excerpt from TRM chapter: " Texas Instruments supports a variety of eXtended Development System (XDS) JTAG controllers with various debug capabilities beyond only JTAG support. Because this device supports the export of processor trace and system trace over the EMU pins, if you want your target to be compatible with XDS products capable of acquiring either trace types, see the following document for guidelines: Emulation and Trace Headers (literature number SPRU655). " CTY Lim said: 2. What will be left non-accessible without EMU[4:2]? See above comment. Also, there will not be many options for concurrent debugging with only 2 emu signals (for triggering or data). See section "Concurrent Debug Modes" in the On-Chip Debug Support chapter of the Technical Reference Manual. CTY Lim said: 3. Is nSRST a must-have connection? No. This is an optional signal that if integrated into your applications power-up-reset circuit may be used to remotely reset the target board from a debugger. See this wiki for details: Thanks, Alex

Hello, I haven't heard back from you, I'm assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread gets locked due to time-out). thanks, Alex