Analog Devices Inc. MAX32655 Low-Power Wireless Microcontrollers

Analog Devices Inc. MAX32655 Low-Power Wireless Microcontrollers are advanced System-on-Chips (SoCs) featuring an Arm® Cortex®-M4F CPU and integrated BLUETOOTH® 5.2. The MAX32655 also integrates power regulation and management with a Single Inductor Multiple Output (SIMO) buck regulator system. The devices offer large onboard memory with 512KB flash and 128KB SRAM, with optional error correction coding on one 32KB SRAM bank. This 32KB bank can be optionally retained in backup mode. An 8KB user One Time Programmable (OTP) area is available, and 8-bytes are retained, even during power-down.

The MAX32655 MCUs support many high-speed interfaces, including multiple QSPI, UART, and I²C, plus one I²S port for connecting to an audio codec. An eight-input, 10-bit Analog-to-Digital Converter (ADC) monitors analog input from external analog sources. The ADI MAX32655 Wireless Microcontroller is available in an 8mm x 8mm CTBGA package, with a -40°C to +105°C operating temperature range.

Features

Ultra-low-power wireless microcontroller
- Internal 100MHz oscillator
- Flexible low-power modes with 3728MHz system clock option
- 512KB flash and 128KB SRAM, Optional ECC on 1x 32KB SRAM bank
- 16KB instruction cache
BLUETOOTH 5.2 LE
- Dedicated ultra-low-power, 32-bit RISC-V coprocessor to offload timing-critical BLUETOOTH processing
- Fully open-source BLUETOOTH 5.2 stack available
- Supports AoA, AoD, LE Audio, and Mesh
- High-throughput (2Mbps) mode
- Long-range (125kbps and 500kbps) modes
- Rx sensitivity: -97.5dBm; Tx Power: +4.5dBm
- Single-ended antenna connection (50Ω)
Power management maximizes battery life
- 0V to 3.6V supply voltage range
- Integrated SIMO power regulator
- Dynamic Voltage Scaling (DVS)
- 8μA/MHz active current at 3.0V
- 4μA at 3.0V retention current for 32KB
- Selectable SRAM retention + RTC in low-power modes

Multiple peripherals for system control
- 2x high-speed SPI master/slave
- 3x high-speed I²C master/slave (3.4Mbps)
- 4x UART, 1x I²S master/slave
- 8-input, 10-Bit Sigma-Delta ADC 8ksps
- 4x micro-power comparators
- Timers: 2x 32-Bit, 2x LP, and 2x watchdog timers
- 1-Wire master
- 4x Pulse Train (PWM) engines
- RTC with wake-up timer
- Up to 52x GPIOs
Security and integrity
- Available secure boot
- TRNG seed generator
- AES 128/192/256 hardware acceleration engine
Physical characteristics
- -40°C to +105°C operating temperature range
- 8mm x 8mm CTBGA81 package; 0.8mm pitch, 9x9 array
- RoHS compliant