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Apollo4 SoC

Leading Edge AI

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The Apollo4 SoC is purpose-built for ultra-low power processing, secure development environments, and vibrant graphics for leading-edge AI applications. Powered by an Arm® Cortex®-M4 processor at up to 192MHz, it delivers efficiency as low as 5µA/MHz alongside up to 2MB of MRAM and 1.8MB of SRAM for complex algorithms and neural networks. With a 2.5D graphics accelerator, MIPI DSI display support, and Secure Boot, Apollo4 is built for smartwatches, fitness bands, voice remotes, predictive health devices, and smart home applications.

Take Charge of Your Life

01

Ultra-efficient performance

Up to 192 MHz processing with turboSPOT® efficiency as low as 5 µA/MHz, enabling powerful applications without sacrificing power consumption.

02

Built for complex workloads:

Up to 2MB MRAM and 1.8MB SRAM to provide the headroom needed to execute complex algorithms, neural networks, and rich graphical interfaces directly on-device.

03

Expandable memory support

Multi-bit SPI and eMMC interfaces make it easy to add external memory for larger datasets, models, or media.

04

Purpose-built for battery devices:

Designed as an application processor or coprocessor for smartwatches, fitness bands, voice remotes, trackers, predictive health, and smart home devices.

Block Diagram Apollo 4 SoC

Block Diagram for the Ultra Low Power Apollo4 SoC

Specifications

Ultra-Low Supply Current

  • 5 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)
  • Secure Boot

Ultra-Low Power Memory

  • Up to 2MB of non-volatile MRAM for code/data
  • Up to 1.8MB 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

  • 3x 2/4/8-bit SPI master interfaces
  • 8x 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)

Display

  • MIPI DSI 1.2 up to 500 Mbps
  • Up to 454 x 454 resolution
  • 4 layers with alpha blending
  • Frame Buffer Decompression

Graphics

  • 2D/2.5D graphics accelerator
  • Full Alpha Blending
  • Texture and Frame Buffer Compression

Audio Processing

  • 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

Power Management

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

Applications

  • 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

  • 5 mm x 5 mm, 146-pin BGA with 105 GPIO

Ordering Information

  • MAP42KK-KBR-B2 (BGA)

Design Resources

Additional Documentation

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Video Library

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Frequently Asked Questions (FAQ)

  • The Apollo4 is an ultra-low-power system-on-chip (SoC) designed for battery-powered edge AI and endpoint devices. It combines an Arm® Cortex®-M4 processor operating at up to 192 MHz with integrated graphics, audio processing, and flexible peripheral interfaces. Apollo4 can serve as either an application processor or coprocessor.

  • The Apollo4 features an Arm® Cortex®-M4 processor with a floating-point unit (FPU) and Memory Protection Unit (MPU), operating at up to 192 MHz. It supports Ambiq’s turboSPOT® technology for high-performance, ultra-low-power processing. 

  • The Apollo4 delivers ultra-low-power processing at 5 µA/MHz when executing from MRAM with cache. Low-power sleep and deep sleep modes with selectable levels of RAM and cache retention help reduce energy consumption in battery-powered devices.

  • The Apollo4 provides up to 2 MB of non-volatile MRAM and up to 1.8 MB of low-power RAM for code and data, providing memory for complex algorithms, neural networks, and rich graphical interfaces.

  • The Apollo4 features a 2D/2.5D graphics accelerator with full alpha blending and texture and frame buffer compression. It supports MIPI DSI 1.2 at up to 500 Mbps, display resolutions up to 454 × 454 pixels, four display layers with alpha blending, and frame buffer decompression.

  • The Apollo4 supports audio processing with four stereo digital microphone interfaces and two full-duplex I2S ports with asynchronous sample rate conversion (ASRC), enabling voice and audio applications in battery-powered endpoint devices.

  • The Apollo4 provides flexible interfaces for connecting sensors, external memory, displays, and other peripherals. These include three multi-bit SPI master interfaces, eight I2C/SPI masters, an SPI slave, four UART modules with flow control, a USB 2.0 HS/FS device controller, and SDIO 3.0 and eMMC 4.51 support.

  • The Apollo4 is designed for smartwatches and fitness bands, wireless sensors and IoT devices, activity and fitness monitors, children’s watches, animal trackers, motion and tracking devices, alarms and security systems, far-field voice remotes, consumer medical devices, predictive maintenance, and smart home applications.

  • Apollo4, Apollo4 Plus, and Apollo4 Lite all feature Arm® Cortex®-M4 processing up to 192 MHz and up to 2 MB of non-volatile MRAM. Apollo4 provides up to 1.8 MB of low-power RAM, while Apollo4 Plus increases low-power RAM to 2.75 MB and adds enhanced graphics and audio capabilities. Apollo4 Lite provides up to 1.4 MB of low-power SRAM and a streamlined set of graphics, audio, and peripheral capabilities.

  • The Apollo4 is available in a 5 × 5 mm, 146-pin BGA package with 105 GPIO. The Apollo4 ordering part number is MAP42KK-KBR-B2. 

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