I have an application where I'm using CC2541 interfaced to a processor. The interface is I2C with CC2541 as a slave. I have implemented errata SWRZ049 and that helped smooth out a lot of issues I initially had when using I2C in conjunction with PM2 sleep mode. However I still occasionally have a symptom that looks like the CC2541 is causing glitches on the I2C data line particularly after reset (my interface starts communicating on I2C about 150ms after reset is de-asserted, but have tried much longer times as well). Note that, this problem goes away if I disable power save mode OR if I use PM1 for power save mode. Haven't tried PM3. Wondering if anyone has run into this or similar issue and if there is a solution for it.
Thanks
Yohannes