NXP K32W041AK

The K32W041A/K32W041AM is an ultra-low-power, high-performance wireless microcontroller based on the Arm Cortex-M4, supporting Zigbee 3.0, Thread, and Bluetooth Low Energy 5.0 network protocol stacks for home and building automation, smart lighting, smart door locks, and sensor network applications. The device integrates a compliant 2.4 GHz Bluetooth Low Energy 5 transceiver (supporting 8 simultaneous connections), a compliant 2.4 GHz IEEE 802.15.4 transceiver, and a rich combination of analog and digital peripherals. Ultra-low current consumption in radio receive, transmit, and power-down modes enables coin cell battery operation. The device features 640 KB embedded Flash, 152 KB RAM, and a maximum radio output power of +15 dBm. The K32W041AM additionally integrates 1 MB data Flash. The embedded Flash supports over-the-air (OTA) code download for applications. The device includes a 10-channel PWM, 2 timers, 1 RTC/alarm timer, a windowed watchdog timer (WWDT), 2 USARTs, 2 SPI interfaces, 2 I2C interfaces, a DMIC subsystem with dual-channel PDM microphone interface featuring voice activity detection, 1 12-bit ADC, a temperature sensor, and 1 comparator. The Arm Cortex-M4 is a 32-bit core offering system enhancements including low power consumption, enhanced debug capabilities, and high-level support for block integration. The Arm Cortex-M4 CPU operates at up to 48 MHz.

• Ultra-low current solution for extended battery life
• Single-chip device capable of running protocol stack and application
• Low system BOM component count and cost
• Flexible sensor interface
• Available in 6×6 mm HVQFN40 package, 0.5 mm pin pitch
• Lead-free and RoHS compliant
• Ambient temperature range: -40℃ to +85℃
• Compliant with 2.4 GHz IEEE 802.15.4 2011 standard
• Compliant with 2.4 GHz Bluetooth Low Energy 5.0 standard
• RX current: 7.0 mA
• IEEE 802.15.4 receive sensitivity: -100 dBm
• Bluetooth Low Energy 5.0 supports 2 Mb/s high data rate
• Bluetooth Low Energy receive sensitivity at 1 MB/s: -97 dBm
• Improved WiFi coexistence performance
• Configurable TX power up to +15 dBm with 46 dB range
• TX current at various power levels: +15 dBm / 51 mA, +10 dBm / 26 mA, +3 dBm / 13 mA, +0 dBm / 10.2 mA
• Supply voltage range: 2.4 V to 3.6 V
• Antenna diversity control support
• Integrated 32 MHz XTAL unit with internal capacitors; suitable external XTAL meets radio accuracy requirements under operating conditions
• Integrated RF balun
• Integrated ultra-low-power sleep oscillator
• Deep power-down current (IO wakeup): 350 nA for K32W041A, 360 nA for K32W041AM
• 128-bit, 192-bit, or 256-bit AES security processor; MAC accelerator supports packet formatting, CRC, address checking, auto-ACK, and timer
• Arm Cortex-M4 application CPU, up to 48 MHz operating frequency
• Integrated Arm NVIC and MPU
• NMI support with selectable interrupt source
• SWD support with 8 breakpoints and 4 watchpoints
• Integrated SysTick timer
• Serial wire output for enhanced debug capability
• On-chip memory: K32W041A with 640 KB flash; K32W041AM with additional 1 MB data flash; both with 152 KB SRAM
• System clock speed range: 12 MHz to 48 MHz, suitable for low-power applications
• 2× I2C bus interfaces, master or slave operation
• K32W041A supports 10× PWM; K32W041AM supports 9× PWM
• 2× integrated low-power timers
• 2× USART, one with flow control support
• 2× SPI bus, master or slave operation
• 1× PDM digital audio interface with hardware-based voice activity detector for reduced power in voice applications; dual-channel microphone interface, flexible decimator, 16-entry FIFOs, and optional DC blocking
• 19-channel DMA engine for efficient peripheral-to-SRAM or SRAM-to-SRAM data transfers; supports fixed or incremental addressing with chainable operations for complex functions at low CPU overhead
• Up to 4 GPIO pin interrupts (PINT), triggerable on rising edge, falling edge, or both edges
• 2× GPIO group interrupts (GINT), triggerable by logical AND/OR combination of input states
• 32-bit RTC with 1 s resolution; RTC timer supports wakeup from sleep, deep sleep, and power-down modes with 1 ms resolution
• Brown-out detection with 8 programmable thresholds
• K32W041A: 8-input 12-bit ADC; K32W041AM: 5-input 12-bit ADC; up to 190 ksamples/s; hardware-supported continuous or single conversion; single or multiple input sampling within one sequence; chainable DMA operations for low-overhead operation
• 1× analog comparator; K32W041AM limited to 1 external input compared against internal reference voltage
• Integrated battery sensor and temperature sensor
• Integrated watchdog timer and power-on reset
• Integrated standby power controller
• K32W041A: up to 22 DIOs; K32W041AM: up to 18 DIOs
• Integrated Quad SPIFI interface: K32W041A for external serial flash access; K32W041AM for internal flash access
• Integrated random number generator engine
• AES engine supporting AES-128 to AES-256
• Hash hardware accelerator supporting SHA-1 and SHA-256
• EFuse support: 128-bit random AES key, configuration modes, and trimming
• Integrated ISO7816 smart card digital interface; operates as smart card reader with suitable external analog components
• Sleep mode: CPU in low-power state awaiting interrupt
• Deep sleep mode: CPU in low-power state awaiting interrupt; additional functions disabled or in low-power state compared to sleep mode
• Power-down mode: main functions powered down; IO wakeup supported; select peripherals (I2C, USART, SPI) wakeable in limited-function mode with low-power timer

• Home and building automation
• Smart lighting
• Smart door locks
• Sensor networks