Secure and Ultra-Low-Power MCU for Matter Over Thread and Bluetooth® LE 5.3

Block Diagram

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K32W148 Architecture

K32W148 Block Diagram

K32W148 Device Features

K32W148 Software Block Diagram


Application Core

  • Up to 96 MHz Arm Cortex-M33 core
  • 1 MB program Flash with ECC
  • 128 kB SRAM
  • Nested Vectored Interrupt Controller (NVIC)
  • Wake-Up Interrupt Controller (WIC)

Radio Core

  • Dedicated CM3 core
  • Secure 256 kB Flash for authenticated NXP 15.4 and Bluetooth Low Energy controller stack firmware
  • 88 kB dedicated SRAM
  • IEEE 802.15.4–2015 compliant radio
  • 101 dBm 250 kbps receive sensitivity
  • Improved enhanced ACK timing support in the 802.15.4 hardware
  • Dual PAN support
  • 2.4 GHz Bluetooth Low Energy Version 5.3 upgradeable radio supporting up to 24 simultaneous hardware connections in any central/peripheral combination
  • –106 dBm 125 kbps Long Range Receive Sensitivity
  • –102 dBm 500 kbps Long Range Receive Sensitivity
  • –97.5 dBm 1 Mbps Receive Sensitivity
  • –95 dBm 2 Mbps Receiver Sensitivity
  • Programmable Transmit Output Power up to +10 dBm
  • Data Rates: 125 kbps, 500 kbps, 1 Mbps, and 2 Mbps
  • Modulation Types: 2 Level FSK, GFSK, MSK, GMSK
  • On-chip balun with single ended bidirectional RF port

EdgeLock Secure Enclave

  • Secure Boot and Debug
  • Symmetric Key Encryption - AES-128/192/256 and ECB, CBC, CTR, GCM, CMAC and CCM Modes
  • Asymmetric Key Encryption - ECC NIST P–192/224/256/384/521, Curve25519
  • Key Exchange algorithms - ECDH(E), SPAKE2+, JPAKE
  • Secure Key Generation, Storage and Management
  • Flash access protection and optional encryption on-the-fly decryption using a PRINCE XEX block cipher mode

Low Power Consumption

  • Transceiver current (DC-DC buck mode, 3.3 V supply)
    • Typical RX: 4.7 mA
    • Typical TX at 0 dBm: 4.6 mA and 18.7 mA at 10 dBm
  • Multiple power-down modes supporting currents as low as 300 nA
  • Ultra-low leakage Smart Power Switch with less than 100 nA sleep current with exit from internal timer or GPIO.


  • 26 MHz and 32 MHz supported for Bluetooth LE and Generic FSK modes
  • 32.768 kHz Crystal Oscillator, optional for Bluetooth LE communication

Operating Characteristics

  • Temperature range (ambient): –40 °C to 105 °C •
  • Temperature range (junction): –40 °C to 125 °C • DC/DC voltage range: 1.8 V to 3.6 V
  • Bypass voltage range: 1.8 V to 3.6 V
  • Qualification: AEC-Q100 Grade 2

Human Machine Interface

  • 29 GPIO (48HVQFN)

System Peripherals

  • DC/DC converter supporting buck and bypass operating modes
  • Asynchronous DMA controller with per channel access permissions (secure/non-secure)
  • Wake-Up unit for power-down modes

Analog Modules

  • 16-bit single ended SAR analog-to-digital converter (ADC) up to 2 Msps
  • Two high-speed analog comparators (CMP) with 8-bit digital-to-analog converter (DAC)
  • 1.0 V to 2.1 V Voltage Reference (Vref)
  • Nested Vectored Interrupt Controller (NVIC)
  • Wake-Up Interrupt Controller (WIC)


  • Two 6-channel 32-bit timers (TPM) with PWM capability and DMA support
  • Two 32-bit low-power timers (LPTMR) or pulse counters with compare features
  • 4-channel 32-bit low-power periodic interrupt timer (LPIT) with DMA support
  • One 56-bit timestamp timer
  • 32-bit seconds real time counter (RTC) with 32-bit alarm and independent power supply
  • Signal frequency analyzer (SFA) provides facilities for measurement of clock period/frequency as well as time between triggers

Communication Interfaces

  • Two Low Power UART (LPUART) modules
  • Two Low Power SPI modules and one MIPI-I3C module
  • Two Low Power I2C (LPI2C) modules supporting the System Management Bus (SMBus) Specification, version 2
  • One programmable FlexIO module supporting emulation of UART, I2C, SPI, Camera IF, LCD RGB, PWM/ Waveform generation


  • 7 x 7 mm 48HVQFN with “Wettable” flanks

Part numbers include: K32W1480VFTBT.


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