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Can KW2x support ZigBee 868 MHz?

Question asked by benjamin chang on Feb 29, 2016
Latest reply on Jul 4, 2016 by Juan Carlos Pacheco

NXP KW2x is supporting 802.15.4, one of our customer is requesting ZigBee 2.4 GHz and 868 MHz (a GB requirement) since last year. So we proposed KW01Z + KW20Z to them. Checking the new EE Times in Feb., link:

We find there is a SiLabs’s Might Gecko wireless SoC supports “The SoC would normally be sleeping, but could periodically wake up to handle 802.15.4 Thread communication and then sub GHz communication

Why can SiLabs’s SoC support this dual-band communication, but KWxx chips cannot? Is this a H/W limitation or S/W issue?