NXP’s advanced 2. implementation of a high performance Arm 3. Cortex®-M7 core operating at speeds up to 800 MHz and a power efficient Cortex®-M4 core up to 400 MHz. The i.MX RT1170 processor has 2 MB on-chip RAM in 4. total, including a 768 KB RAM which can be flexibly configured as TCM (512.