Apollo4 Blue Plus

Connecting Brilliance with Visual Excellence

Apollo4 Blue Plus provides Bluetooth® Low Energy connectivity and superior graphical performance for ultra-low power applications at the endpoint.

Performance Meets Power Savings


The Power to Innovate

Ultra-low power processing of 4µA/MHz at up to 192MHz with turboSPOT® enables next generation devices to do more for longer.


Visual Brilliance

High performance 2.5D GPU featuring full alpha blending, vector graphics, and more for vibrant, crystal-clear, and smooth graphics.


Uncompromising Security

Certified PSA L1 running advanced secureSPOT® for secure applications. Learn more at https://ambiq.com/securespot/.


AI-Powered Possibilities

Experience intelligence at the endpoint, including activity recognition, speech enhancement and de-noising, and real-time health analytics. Learn more at https://ambiq.ai/.

Block Diagram for the Ultra-Low Power Apollo4 Plus Blue SoC


Ultra-Low Supply Current

  • 4 μA/MHz executing from MRAM (with cache)
  • Low-power sleep and deep sleep modes with selectable levels of RAM/cache retention

High-Performance Arm Cortex-M4 Processor with FPU

  • Up to 192 MHz clock frequency
  • Floating Point Unit (FPU)
  • Memory Protection Unit (MPU)

Bluetooth Low Energy 5.4

  • 2 Mbps, extended advertising packets
  • Angle of Arrival (AOA) and Angle of Departure (AOD)
  • Tx: Up to +6 dBm output power
  • Rx Sensitivity: -95 dBm

Security Features

  • Secure Boot
  • Secure over-the-air (OTA) updates
  • Secure wired updates
  • Key Recovation

Ultra-Low Power Memory

  • Up to 2MB of non-volatile MRAM for code/data
  • Up to 2.75MB of low power RAM for code/data

Ultra-Low Power Interface for On- and Off-Chip Sensors

  • 12-bit ADC, 11 selectable input channels
  • Up to 2.8 MS/s sampling rate
  • Temperature sensor with ±3°C accuracy

Ultra-Low Power Flexible Serial Peripherals

  • 2x 2/4/8-bit SPI master interfaces
  • 2/4/8/16-bit SPI master interface (16-bit SPI available in AMA4BPK-KXR only)
  • 7x I2C/SPI masters for peripheral communication
  • 1x SPI slave for host communications
  • 4x UART modules with flow control
  • 1x USB 2.0 HS/FS device controller
  • 1x SDIO (SD3.0)/1x eMMC (v4.51)


  • MIPI DSI 1.2 with 2 data lanes up to 500 Mbps
  • Up to 500 x 500 resolution
  • 4 layers with alpha blending
  • Frame Buffer Decompression


  • 2D/2.5D graphics accelerator
  • Full Alpha Blending
  • Texture and Frame Buffer Compression
  • Anti-Aliasing
  • Dithering
  • Vector Graphics

Audio Processing

  • 1x stereo Low Power Analog microphones
  • 4x stereo Digital microphones
  • 2x full-duplex I2S ports with ASRC

Rich Set of Clock Sources

  • 16-52 MHz and 32.768 kHz Crystal (XTAL) oscillators
  • 1 kHz Low Frequency RC (LFRC) oscillator
  • 2x High Frequency RC (HFRC) oscillator – 192/384 MHz

Power Management

  • Operating range: 1.71-2.2 V, –20°C to 60°C
  • SIMO buck
  • Multiple I/O voltages supported


  • Smart watches/bands
  • Wireless sensors and IoT
  • Activity and fitness monitors
  • Children's watches
  • Animal trackers
  • Motion and tracking devices
  • Alarms and security system
  • Far-field voice remotes
  • Consumer medical devices
  • Predictive maintenance
  • Smart home

Package Options

  • 4.7 mm x 4.7 mm, 131-pin SiP BGA

Ordering Information


Design Resources

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