MAX32665-MAX32668 User Guide
Maxim Integrated Page 24 of 457
1. Overview
The MAX32665–MAX32668 are Arm® Cortex®-M4 with FPU-based microcontrollers with 1MB flash and up to 560KB SRAM
that can be configured as 448KB SRAM with error correction coding (ECC). They are ideal for wearable medical fitness
applications. Optionally available is a second Arm Cortex-M4 with FPU for audio signal processing in a wireless
headset/earbud application (MAX32665/MAX32666 only). The architecture includes a Bluetooth® 5 Low Energy radio.
The MAX32665/MAX32666 feature a second Arm Cortex-M4 with FPU with supporting ROM and cache. This feature
supports extended data processing capabilities such as audio processing for wireless Bluetooth applications. Refer to the
Ordering Information in the device datasheet for device feature detail.
The devices feature five powerful and flexible power modes. Built-in dynamic clock gating and firmware-controlled power
gating allows the user to optimize power for the specific application. A built-in single inductor multiple output (SIMO)
switch mode power supply allows the device to be optionally self-powered by a primary lithium cell.
The flash memory is split into two banks of 512KB to provide flexibility when programming over-the-air. The devices have
an ECC with single error correction double error detection (SEC-DED) for flash, and SRAM providing extremely reliable code
execution. Dedicated hardware runs the Bluetooth 5 Low Energy stack freeing the CPUs for data processing tasks. Multiple
SPI, UART, and I2C serial interfaces, 1-Wire® Master, and USB 2.0 High-Speed Device interface allow for interconnection to a
wide variety of external sensors. An audio subsystem supporting PDM, PCM, I
2
S, and TDM. An 8-input, 10-bit ADC is
available to monitor analog input from external sensors and meters.
The MAX32666/MAX32668 incorporate a trust protection unit (TPU) with encryption and advanced security features. These
features include a modular arithmetic accelerator (MAA) for fast ECDSA, a hardware AES engine, a hardware TRNG entropy
generator, a SHA-2 accelerator and a secure bootloader.
The high-level block diagram for the MAX32665—MAX32668 is shown in Figure 1-1.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
Arm is a registered trademark and registered service mark of Arm Limited.
Cortex is a registered trademark of Arm Limited.
Bluetooth is a registered trademark of Bluetooth SIG, Inc.
To Next Page
Loading...
Need help?
General