S32K中的主题 s32k314 Debug Hardware Questions

s32k314 Debug Hardware Questions

Oido — Fri, 24 May 2024 01:33:01 GMT

Hello, I am designing a PCB using S32K314. This is my first time designing a PCB and I am having a hard time. The debug equipment I am currently using is USB Multilink Universal, Rev. E. And I read Hardware Design Guides for S32K3XX Microcontrollers and drew an example circuit called JTAG connector with a CAD program.
But when I look at the manual of USB Multilink Universal, it says JTAG is 14PIN. What should I do?
Can I use other debug pins? And even if I can, there are no circuit guidelines in the Hardware Design Guides for S32K3XX Microcontrollers document to pack other debug pins. Please help. This is the JTAG I drew.

Re: s32k314 Debug Hardware Questions

VaneB — Fri, 24 May 2024 21:10:03 GMT

Hi @Oido

The USB Multilink Universal and the USB Multilink Universal FX have several debug headers inside to support NXP devices & other ARM Cortex microcontrollers. For S32K3 devices there are the PORT B (STANDARD ARM), PORT F (MINI 20), and PORT G (MINI 10).

So, we recommend following the circuit guidelines provided in section 4.2 (JTAG and TRACE interface) of the Hardware Design Guides for S32K3XX Microcontrollers. You can also use as a reference the S32K3 Evaluation Board's schematics.

B.R.

VaneB

Re: s32k314 Debug Hardware Questions

Oido — Wed, 17 Jul 2024 05:47:42 GMT

I looked at the S32K344 - Q172 board and drew it along the circuit.
This corresponds to PORTF among the photos you provided.
TDO, TDI, and RST have 5V output
The TCK is connected to the ground and outputs 0V.
However, TMS is connected to PTA4 with 1.5 to 1.6V output.