wider range of footprints, offer a greater number of resources (I/O pins, embedded RAM, and logic elements), but consume more power. LP devices differ from the Ultra devices in that they do not include hard IP cores. Instead, any interface logic must be implemented in the FPGA fabric. This is generally less preferable, as so-called "soft cores" are less power-efficient than hard cores, and often are unable to operate at the same frequencies. A soft core also reduces the number of logic cells available to the application. LM devices integrate two I²C and two SPI hard cores, as well as two strobe generators. Most LP and LM devices integrate one or two phase-locked loops. The families were launched in mid 2011 and entered volume production in mid 2012. They won the Elektra Digital Semiconductor Product of the Year award for 2012. In 2015, it was announced that ZTE would use LM devices to provide sensor hub and infrared remote control functionality in its Star 2 smartphone. iCE40 HX The iCE40 HX devices are intended for high-performance applications. Compared to iCE40 LP and Ultra devices, they offer lower maximum propagation delay (7.30ns versus 9.00–9.36ns), and more I/O pins. HX series devices consume significantly more static power and are available only in significantly larger footprints compared to Ultra and LP parts (7×7mm to 2×2cm). Similarly to the LP devices, HX parts do not provide hard IP cores, but do provide one or two phase-locked loops. Unlike other iCE40 devices, the HX parts are also available in QFP footprints. The HX parts were launched in mid 2011 alongside the LP parts, and entered volume production in mid 2012. See also Digital logic References Gate arrays Integrated circuits Field-programmable gate arrays