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Apollo4 Plus

Powerful Graphics. Efficiently Driven.

Apollo4 Plus keyvisual front mobile

Vibrant graphics, ultra-low power processing, and AI at the endpoint made possible by Apollo4 Plus. Built around an Arm® Cortex®-M4 processor at up to 192MHz with turboSPOT® acceleration, it pairs a 2.5D GPU for vibrant displays with always-on audio processing and secureSPOT® end-to-end security, including Secure Boot and secure OTA updates — enabling smartwatches, fitness trackers, and other battery-powered wearables to deliver rich graphics and audio without draining the device’s battery.

Performance Meets Power Savings

Apollo 4 Plus

01

Purpose-Built SoC

With turboSPOT® high-frequency operation and ample memory, this platform is engineered to drive battery-powered graphics, audio solutions, and more.

02

Extreme LP Modes

Make the most of your power budget with our flexible, low-power sleep and deep sleep modes with selectable levels of RAM/cache retention.

03

Always-on Audio

Achieve multi-channel processing and high-fidelity digital audio with enhanced digital filtering and low power audio interfaces.

04

Safe and Secure

secureSPOT® ensures a complete end-to-end secure environment with Secure Boot, secure over-the-air (OTA) and wired updates, secure key storage in OTP memory, secure debug and more.

Block Diagram Apollo4 Plus

Apollo4 Plus 1

Specifications

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)

Security Features

  • Secure boot
  • Secure over-the-air (OTA) updates
  • Secure wired updates
  • Key Revocation

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
  • 8x I2C/SPI masters for peripheral communication
  • 1x SPI slave for host communications
  • 4x UART modules with flow control
  • 1x USB 2.0 FS device controller
  • 1x SDIO (SD3.0)/1x eMMC (v4.51)

Display

  • 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

Graphics

  • 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 Crystals (XTAL) oscillators
  • 1 kHz Low Frequency RC (LFRC) oscillator
  • 2x High Frequency RC (HFRC) oscillator

Power Management

  • Operating voltage range: 1.71 V – 2.2 V
  • Operating temperature range: -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

  • AMAP42KP-KBR (BGA)

Where to Buy

Design Resources

Additional Documentation

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Frequently Asked Questions (FAQ)

  • The Apollo4 Plus is an ultra-low-power system-on-chip (SoC) designed for battery-powered edge devices requiring advanced graphics, always-on audio, and edge AI processing. It combines an Arm® Cortex®-M4 processor operating at up to 192 MHz with a 2D/2.5D graphics accelerator, high-fidelity audio capabilities, and up to 2.75 MB of low-power RAM.

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

  • Ambiq’s turboSPOT® technology enables the Apollo4 Plus to scale processing performance up to 192 MHz while maintaining ultra-low-power operation. The SoC consumes 4 µA/MHz when executing from MRAM with cache, helping battery-powered devices balance processing performance and energy consumption. 

  • The Apollo4 Plus features a 2D/2.5D graphics accelerator with full alpha blending, anti-aliasing, dithering, vector graphics, and texture and frame buffer compression. It supports MIPI DSI 1.2 with two data lanes up to 500 Mbps, display resolutions up to 500 × 500 pixels, and four layers with alpha blending.

  • Yes. The Apollo4 Plus supports multi-channel, high-fidelity digital audio for always-on audio applications. It includes one stereo low-power analog microphone interface, four stereo digital microphone interfaces, and two full-duplex I2S ports with asynchronous sample rate conversion (ASRC).

  • The Apollo4 Plus features Ambiq’s secureSPOT® security technology for end-to-end device security. Capabilities include Secure Boot, secure over-the-air (OTA) updates, secure wired updates, secure key storage in OTP memory, secure debug, and key revocation.

  • The Apollo4 Plus provides up to 2 MB of non-volatile MRAM for code and data and up to 2.75 MB of low-power RAM for code and data.

  • The Apollo4 Plus 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. 

  • The Apollo4 Plus is available in a compact 5 × 5 mm, 146-pin BGA package with 105 GPIO. The Apollo4 Plus ordering part number is AMAP42KP-KBR. 

  • Yes. Ambiq offers the AMAP4PEVB evaluation board for Apollo4 Plus development and the AMAP4PDISP display kit for evaluating graphics, display, audio, and other capabilities. 

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