http://www.futureelectronics.com/en/Search.aspx?dsNav=Ntk:ManufacturerPartNumberUpshiftedSearch%7c*CY8C42*%7c1%7c,Ny:True,Ro:0,Nea:True,N:587 . PSoC4 was designed for your low power application. It is the perfect chip to use in IOT and wearable applications. Whether it’s adjusting clock frequencies, moving in and out of low power modes, or lowering the CPU load by pushing critical functions. http://youtu.be/xbDNx2DEGB4