topic Re: How to test imx6s with IEEE 1149.1 in i.MX Processors

How to test imx6s with IEEE 1149.1

zhengluyan — Tue, 13 Apr 2021 03:14:33 GMT

In the boundary scan test of imx6s motherboard, the correct idcode cannot be obtained. In addition to the standard JTAG 5 wires (JTAG)_ TMS、JTAG_ TCK、JTAG_ TRSTB、JTAG_ TDI、JTAG_ Does imx6s have special control when entering boundary scan mode? How to test imx6s with IEEE 1149.1.

Re: How to test imx6s with IEEE 1149.1

igorpadykov — Tue, 13 Apr 2021 04:40:29 GMT

Hi Luyan

for boundary scan mode JTAG_MOD should be high, also one can look at

sect.Chapter 9 Using BSDL for Board-level Testing

IMX6DQ6SDLHDG, Hardware Development Guide for i.MX 6Quad, 6Dual, 6DualLite, 6Solo Families of Applications Processors

Best regards
igor

Re: How to test imx6s with IEEE 1149.1

zhengluyan — Tue, 13 Apr 2021 06:54:17 GMT

hello dear sir:

Below is the board settings which I have used:

JTAG_MOD is High;

POR_B is High;

BOOT_MODE[1:0] is [1:0] or[0:0] ?

What does "BSDL was only tested at 1.8 V." mean? is NVCC_JTAG is 1.8V or all NVCC power is 1.8V? or other ?

Thanks very much

Re: How to test imx6s with IEEE 1149.1

zhengluyan — Tue, 13 Apr 2021 07:40:39 GMT

hello dear sir:

JTAG in e-fuse bits_ Smode [1:0] and SJC_ Does disable need to be 0?

Thanks very much

Re: How to test imx6s with IEEE 1149.1

igorpadykov — Wed, 14 Apr 2021 10:15:31 GMT

one can look at AN4686

Configuring Secure JTAG for the i.MX 6 Series Family of Applications Processors

Best regards
igor

Re: How to test imx6s with IEEE 1149.1

zhengluyan — Thu, 15 Apr 2021 02:17:36 GMT

Hi~igorpadykov :

I want to know what means"BSDL was only tested at 1.8 V." in the document IMX6DQ6SDLHDG.pdf

Thanks very much!