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XRES_N needed for JTAG programming? | Cypress Semiconductor

XRES_N needed for JTAG programming?

Summary: 3 Replies, Latest post by Bob Marlowe on 04 Aug 2015 05:19 AM PDT
Verified Answers: 1
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Dominik Gebhardt's picture
12 posts


I have a question about the reset pins on a CY8C5467AXI-LP108 device.
From this datasheet (page 7) the JTAG connector uses the nTRST pin (P1.5). But regarding to the CY8C54LP family datasheet XRES and nTREST are used (page 60). Regarding the applicationnote AN61290 only the XRES is being used.

I would like to program and debug the device with the MiniProg3.
Do I need the trace connections for debugging using breakpoints and ISRs?

Best regards


Lingling Guo's picture
Cypress Employee
2 posts


Because the  nTRST and XRES are different. The XRES's function is to reset our chip. But the nTRST is to reset the standard JTAG tool. So  if you want to use the reset mode, you must connect with XRES. But the nTRST is optional.


Guo lingling

multitecheg_1417106's picture
1 post


I am a beginner and I have the JTAG Segger , can I used it to programming the PSoC1 ?

when have photo to communication is good

best regards 

user_1377889's picture
9268 posts

Welcome in the forum, but there is a PSoC1 forum where you should ask that question, here you are in PSoC5.



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