topic Re: Custom Board LS1012A, JTAG and TBSCAN_EN_B Question in QorIQ

Custom Board LS1012A, JTAG and TBSCAN_EN_B Question

Forwardedge — Mon, 29 Jul 2024 22:32:45 GMT

Hi,

I have designed custom board based on LS1012A, trying t activate the JTAG. Seems not working. Can you please confirm of the TBSCAN_EN_B should be tied LOW for JAT activity and High or left open for no JTAG ?

Attached SCH of the unit

Thank you and Kind Regards

Re: Custom Board LS1012A, JTAG and TBSCAN_EN_B Question

Hector_Villarruel — Tue, 30 Jul 2024 01:14:12 GMT

Hello @Forwardedge

Hope this post finds you well,

This email is to inform you that we acknowledge the receipt of your case,
I Keep working on the solution on this case.
I’ll keep you informed on the process,

BR,

Hector

Re: Custom Board LS1012A, JTAG and TBSCAN_EN_B Question

Hector_Villarruel — Tue, 30 Jul 2024 21:22:16 GMT

Hello @Forwardedge

Hope this post finds you well,

Please note that TBSCAN_EN_B is an IEEE 1149.1 JTAG Compliance Enable pin.
• 0:To be compliant to the 1149.1 specification for boundary scan functions.
The JTAG compliant state is documented in the BSDL.
• 1: JTAG connects to DAP controller for the ARM core debug.

Have a great day.

BR,

Hector V