The MKM34Z256VLL7R from NXP USA Inc. is an ARM® Cortex®-M0+ Kinetis KM microcontroller Integrated Circuit with a single core, 32-bit architecture, a 75 MHz clock and 256KB (256K x 8) flash memory in a 100-LQFP (14x14) package.
The MKM34Z256VLQ7 from NXP USA Inc. is an ARM® Cortex®-M0+ Kinetis KM 32-bit single-core microcontroller Integrated Circuit running at 75 MHz with 256 KB (256K x 8) flash memory, in a 144-LQFP (20x20) package.