CC3551E

Microcontroller

• Powerful 160MHz Arm Cortex-M33 processor with FPU, TrustZone, and AI acceleration
• High-speed quad-SPI and octal-SPI for XiP flash with on-the-fly decryption
• Flexible configuration of low-latency TCM (up to 32KB) and Cache (32KB or 64KB) for improved code execution performance
• 1.1MB embedded SRAM including 128KB TCM for Wi-Fi™, Bluetooth Low Energy, networking, and application data

Peripherals

• Up to 38 I/Os with flexible multiplexing options
• 8 × general-purpose timers and pulse-width modulation (PWM)
• 3 × universal asynchronous receiver-transmitter (UART)
• 2 × Serial Peripheral Interface (SPI)
• 2 × inter-integrated circuit (I2C)
• Inter-IC sound (I2S)
• Pulse density modulation (PDM)
• Secure digital and multimedia card (SD/MMC)
• Secure digital input output (SDIO) 2.0
• Controller area network (CAN) 2.0
• 8-channel, 12-bit analog-to-digital converter (ADC)

System Services

• Direct memory access (DMA)
• One-time-programmable memory (OTP)
• Real-time clock (RTC) and watchdog timer (WDT)

Radio

• Wi-Fi 6 (802.11ax)

  • 2.4GHz and 5GHz, single-stream 20MHz channels with application throughput up to 20Mbps (UDP)
  • Compatible with IEEE 802.11 a/b/g/n/ax
    • Orthogonal frequency-division multiple access (OFDMA)
    • Target wake time (TWT)
    • Trigger frames
    • Basic service set (BSS) color
  • Integrated PA for a complete WLAN system with up to 20.5dBm output power at 1 DSSS
  • Role support: STA, softAP , Wi-Fi direct, multi-role AP + STA
  • Support for personal and enterprise Wi-Fi security: WPA and WPA2 PSK, WPA2 Enterprise, WPA3 personal or enterprise
  • Wi-Fi TX Power:
  • • 20.5dBm at 1DSSS
    • 17.8dBm at 54OFDM
  • Wi-Fi RX Sensitivity:
    • –98.7dBm at 1DSSS
    • –76.6dBm at 54OFDM
• Bluetooth low energy
  • Bluetooth low energy 5.4 certified stack
  • Supports long-range and high-speed PHYs (up to 2Mbps)

Security Features

• ARM TrustZone
• Hardware security module supporting all of the following:
  • ECC, RSA, AES, SHA2/3, MD5, CRC 16/32, and TRNG
  • Secure key storage
• Initial secure programming
• Secure boot
• Software IP and cloning protection
• Debug security through JTAG and debug port lock
• OTP with the ability to program root-of-trust public key
• Secure over-the-air (OTA) updates
• Anti-rollback protection

Clock Source

• Fast clock: 52MHz XTAL
• Slow clock: Internal low-frequency oscillator, 32.768kHz XTAL, or external slow clock source

Power Management

• Support for 3.3V and 1.8V on multiple I/O domains
• Supplies: VPA: 3.3V, VMAIN: 1.8V, VIO: 1.8/3.3V

Key Benefits

• Complete software development kit with open-source TCP/IP and TLS stacks
• Operating temperature: –40°C to +105°C
• Support for 3-wire PTA coexistence interface for use with external 2.4GHz radios (for example Thread or Zigbee)
• Antenna selection capability

Package

• Easy to design with 56-pin, 7mm × 7mm quad flat no leaded (QFN) package