XMOS automatic boot

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

XMOS automatic boot

Post by CORE »

Hello,
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!
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mmar
Experienced Member
Posts: 123
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.
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CousinItt
Respected Member
Posts: 365
Joined: Wed May 31, 2017 6:55 pm

Post by CousinItt »

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