High-Reliability, Ultralow-Power Microcontroller Powered by Arm Cortex-M4 Processor with FPU for Industrial and IoT

In the Darwin family, the MAX32670 is an ultra-low-power, cost-effective, high-reliability 32-bit microcontroller enabling designs with complex sensor processing without compromising battery life. It combines a flexible and versatile power management unit with the powerful Arm® Cortex®-M4 processor with a floating point unit (FPU). It also offers legacy designs an easy and cost-optimal upgrade path from 8- or 16-bit microcontrollers.

The device integrates 384KB (376KB user) of flash memory and 160KB of SRAM to accommodate application and sensor code. Additional features, such as the two windowed watchdog timers with fully flexible and independent clocking, have been added to further enhance reliable operation. Brown-out detection ensures proper operation during power-down/power-up events and unexpected supply transients.

Multiple high-speed peripherals such as 3.4MHz I2C, 50MHz SPI, and UARTs maximize communication bandwidth. In addition, a low-power UART is available for operation in the lowest-power sleep modes to facilitate wake-up on activity without any loss of data. A total of six timers with I/O capability are provided, including two low-power timers to enable pulse counting, capture/compare, and PWM generation in the lowest-power sleep modes. All of this capability is packaged in a tiny form factor: 5mm × 5mm, 40-pin TQFN-EP or 1.75mm × 2.50mm, 24-bump WLP.

Applications

* Smart Sensor Controller

* Industrial Sensors

* Optical Communication Modules

* Secure Radio Modem Controller

* Battery-Powered Medical Devices

* System Housekeeping Controller

* Algorithm Coprocessor

* High-Efficiency Microcontroller for Low-Power, High-Reliability Devices

* Arm Cortex-M4 Core with FPU up to 100MHz

* 384KB (376KB User) of Flash Memory

* 160KB SRAM, Optionally Preserved in Lowest

Power Modes

* 16KB Unified Cache

* Dual- or Single-Supply Operation

* Ultra-Low 0.9V to 1.1V VCORE Supply Voltage

* Internal LDO Operation from 1.7V to 3.6V Single

Supply

* Flexible Clocking Schemes

* Internal High-Speed 100MHz Oscillator

* Internal Low-Power 7.3728MHz and Ultra-Low-Power 80kHz Oscillators

* 16MHz to 32MHz Oscillator (External Crystal

Required)

* 32.768kHz Oscillator (External Crystal Required)

* External Clock Input for the Core

* External Clock Input for the LPUART and LPTMR

* Power Management Maximizes Uptime for Battery

Applications

* 44μA/MHz ACTIVE Mode at 0.9V up to 12MHz

* 50μA/MHz ACTIVE Mode at 1.1V up to 100MHz

* 2.6μA Maximum Memory Retention Current in

BACKUP Mode at VDD = 1.8V

* 350nA Ultra-Low-Power RTC at VDD = 1.8V

* Wake from LPUART or LPTMR