KW45: 32-Bit Bluetooth® 5.3 Long-Range MCUs with CAN FD and LIN Bus Options, Arm® Cortex®-M33 Core

KW45

KW45’s three-core architecture integrates a 96 MHz CM33 application core, dedicated CM3 radio core and an isolated EdgeLock Secure Enclave. The Flash-based radio core with dedicated SRAM delivers a highly configurable and upgradeable software-implemented radio, freeing resources on the main core for customer application space.

The Bluetooth Low Energy 5.3-compliant radio supports up to 24 simultaneous secure connections. The EdgeLock Secure Enclave’s isolated execution environment provides a set of cryptographic accelerators, key store operations and secure lifecycle management that minimizes main core security responsibilities.

The KW45 MCU additionally integrates FlexCAN, helping enable seamless integration into an automobile’s in-vehicle or industrial CAN communication network. The FlexCAN module can support CAN’s flexible data rate (CAN FD) for increased bandwidth and lower latency.

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KW45 Architecture

KW45 Block Diagram

KW45 Device Features

KW45 Software Block Diagram
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Features

Application Core

  • Up to 96 MHz Arm Cortex-M33 core
  • 1 MB Program Flash
  • 128 kB SRAM
  • Nested Vectored Interrupt Controller (NVIC)

Radio Core

  • Dedicated CM3 core
  • Secure 256 kB Flash for authenticated NXP Bluetooth Low Energy controller stack firmware
  • 88 kB dedicated SRAM
  • 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

Clocks

  • 32 MHz supported for Bluetooth LE and Generic FSK modes
  • 32.768 kHz Crystal Oscillator

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

  • 22 General-purpose input/output (GPIO) (40HVQFN)
  • 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)

Timers

  • 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

  • FlexCAN with CAN and CAN FD supporting the full implementation of the CAN Specification Version 2.0, Part B. FD Support
  • Two Low Power UART (LPUART) modules with LIN support
  • 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

Packaging

  • 6 x 6 mm 40HVQFN with “Wettable” flanks
  • 7 x 7 mm 48HVQFN with “Wettable” flanks

Part numbers include: KW45B41Z52AFPBT, KW45B41Z52AFTBT, KW45B41Z53AFPBT, KW45B41Z53AFTBT, KW45B41Z82AFPBT, KW45B41Z82AFTBT, KW45B41Z83AFPBT, KW45B41Z83AFTBT, KW45Z41052AFPBT, KW45Z41052AFTBT, KW45Z41053AFPBT, KW45Z41053AFTBT, KW45Z41082AFPBT, KW45Z41082AFTBT, KW45Z41083AFPBT, KW45Z41083AFTBT.

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