Electronics Weekly
Called MAX32666, and part of the company’s Darwin family, it has dual 96MHz Arm Cortex-M4 cores, both with their own floating point unit, and Bluetooth Low Energy 5.2, as well as power management functions.
Also on-board is a ‘trust protection unit’ (TPU) with encryption, an arithmetic accelerator for elliptic curve digital signature algorithms, a hardware AES engine, a hardware true random number entropy generator (TRNG), a SHA-2 accelerator and a secure bootloader.
“The IC’s hardware accelerators provide AES-128, -192 and -256 encryption, while TRNG seed generator and SHA-2 accelerator enhance security,” according to the company. “It also protects IP firmware with a secure bootloader..
It is a super-set device, with MAX32665 and ..668 available with combinations of one less processor and no TPU – see diagram for options.
Memory includes up to 1Mbyte flash memory and 560kbyte SRAM with optional error correcting code (ECC) on flash, ram and cache to increase reliability.
Part of power management is a built-in single-inductor, multiple-output (SIMO) regulator, with four voltage-programmable buck regulator outputs, that allows single coin cell operation.
2Mbit/s BLE 5.2 data throughput is available, and long-range operation at 125kbit/s and 500kbit/s. Transceiver output power is 4.5dBm and receive sensitivity is -95dbm.
Packaging is 3.8mm x 4.2mm WLP.
The BLE MCU product page is here, and there is an evaluation kit.
