NXP MIMXRT685SFVKB

The RT600 is a family of dual-core microcontrollers for embedded applications featuring an Arm Cortex-M33 CPU combined with a Cadence Xtensa HiFi4 advanced Audio Digital Signal Processor CPU. The Cortex-M33 includes two hardware coprocessors providing enhanced performance for an array of complex algorithms. The family offers a rich set of peripherals and very low power consumption. The Arm Cortex-M33 is a next generation core based on the ARMv8-M architecture that offers system enhancements, such as ARM TrustZone security, single-cycle digital signal processing, and a tightly-coupled coprocessor interface, combined with low power consumption, enhanced debug features, and a high level of support block integration. The ARM Cortex-M33 CPU employs a 3-stage instruction pipe and includes an internal prefetch unit that supports speculative branching. A hardware floating-point processor is integrated into the core. On the RT600, the Cortex-M33 is augmented with two hardware coprocessors providing accelerated support for additional DSP algorithms and cryptography. The Cadence Xtensa HiFi 4 Audio DSP engine is a highly optimized audio processor designed especially for efficient execution of audio and voice codecs and pre- and post-processing modules. It supports four 32x32-bit MACs, some support for 72-bit accumulators, limited ability to support eight 32x16-bit MACs, and the ability to issue two 64-bit loads per cycle. There is a floating point unit providing up to four single-precision IEEE floating point MACs per cycle. The RT600 provides up to 4.5 MB of on-chip SRAM (plus an additional 128 KB of tightly-coupled HiFi4 ram) and several high-bandwidth interfaces to access off-chip flash. The FlexSPI flash interface supports two channels and includes an 32 KB cache and an on-the-fly decryption engine. The RT600 is designed to allow the Cortex-M33 to operate at frequencies of up to 300 MHz and the HiFi4 DSP to operate at frequencies of up to 600 MHz.

• Arm Cortex-M33 processor, running at frequencies of up to 300 MHz.
• Arm TrustZone.
• Arm Cortex-M33 built-in Memory Protection Unit (MPU) supporting eight regions
• Hardware Floating Point Unit (FPU).
• Arm Cortex-M33 built-in Nested Vectored Interrupt Controller (NVIC).
• Non-maskable Interrupt (NMI) input.
• Two coprocessors for the Cortex-M33: a hardware accelerator for fixed and floating point DSP functions (PowerQuad) and a Crypto/FFT engine (Casper). The DSP coprocessor uses a bank of four dedicated 2 KB SRAMs.