XMOS automatic boot

Technical discussions around xCORE processors (e.g. xcore-200 & xcore.ai).
New User
Posts: 2
Joined: Wed May 17, 2023 9:50 am

XMOS automatic boot

Post by CORE »

We used a simple RC circuit for our reset circuit of XEF216-512-TQ128 to wait 1ms after the power is enabled. Sadly, our chip only boots if we start a program with the XTAG Programmer, but it is our goal to make it start if powered on. I attached screenshots of our boot sequence below (Yellow=Reset_N, Blue=3,3V, Red=1V). Do you think we have a hardware problem here, or is there a special flag in the software that is needed to start the XMOS processor when it is powered on?

Thank you in advance; we appreciate any helpful information!
You do not have the required permissions to view the files attached to this post.

Experienced Member
Posts: 118
Joined: Fri Jul 05, 2013 5:55 pm

Post by mmar »

Simpler RC isnt good for XMOS plus at moment of reset you need valid CLK. Not scoped.
Try quicker RC or better voltage controller reset ICs.
User avatar
Respected Member
Posts: 345
Joined: Wed May 31, 2017 6:55 pm

Post by CousinItt »

See the section headed "Board Integration" in the data sheet.