Apollo4 01

Apollo4 SoC EVB

The Apollo4 SoC family is the 4th generation system processor solution built upon Ambiq's proprietary Subthreshold Power-Optimized Technology (SPOT™) platform. Apollo4's complete hardware and software solution enables the battery-powered endpoint devices of tomorrow to achieve a higher level of intelligence without sacrificing battery life. Apollo4 with its 32-bit Arm® Cortex®-M4 core with Floating Point Unit (FPU) is implemented on the TSMC® 22nm ULL process. General availability will begin in Q3, 2021.

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Apollo3 Blue Plus EVB Drawing
Apollo4 SoC EVB

Block Diagram for the Ultra-Low Power Apollo4 SoC

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Apollo4, with an integrated with its 32-bit Arm® Cortex®-M4 core with Floating Point Unit (FPU), is the industry’s first SoC implemented on the TSMC® 22nm ULL process. With up to 192 MHz clock frequency enabled by Ambiq's TurboSPOT, Apollo4 can achieve an unmatched 4 µA/MHz power efficiency when executing from SRAM and MRAM with cache. Coupled with up to 2MB of MRAM and 1.8MB of SRAM, the Apollo4 has more than enough compute and storage to handle complex algorithms and neural networks while displaying vibrant, crystal-clear, and smooth graphics. If additional memory is required, external memory is supported through Ambiq’s multi-bit SPI and eMMC interfaces.
Apollo4 is purpose-built to serve as both an application processor and a coprocessor for battery-powered endpoint devices, including smartwatches, children’s watches, fitness bands, animal trackers, far-field voice remotes, predictive health and maintenance, and the smart home.

Apollo4 enables manufacturers to create leading-edge endpoint devices leveraging the unique SPOT platform with Ambiq’s easy-to-use, rich peripheral set. General availability will begin in Q3, 2021.

Purpose-built SoC

Designed for the small form factor, battery-powered, endpoint IoT devices with more than enough compute and storage capacity to handle complex algorithms and neural networks.

Superior Graphics and Display

Support for high-resolution with accelerated 2/2.5D graphics, up to 640x480 and 32bit color, and MIPI DSI high-speed interface for displays in smartwatches and healthcare monitoring devices.

High Energy Efficiency

Up to 192 MHz clock frequency, Ambiq TurboSPOT technology allows applications to meet critical timing as/when needed while still providing extremely high energy efficiency operation.

Always-on Audio

Proprietary audio interfaces and an ultra-low power analog microphone ADC for truly always-on voice processing. Enhanced digital audio interfaces to support high fidelity, multiple channel audio processing.

Dual-Purpose SoC

Versatile as either an application processor with a fully integrated audio subsystem and interface to Bluetooth Low Energy LE5 and WiFi radios, or a coprocessor for applications with constraints in cost, space, performance, and power consumption.

New Interfaces

Support for new interfaces: USB HS/FS, SDIO, e.MMC. Enhanced digital audio interfaces to support high fidelity, multiple channel audio processing.

Faster Time to Market

With a full SDK with reference code, extended debug and tracking tools, and special robust security, we are committed to helping our customers bring products to the market much faster with our complete solutions.

Better User Experience

Apollo4 provides unmatched power efficiency to allow increased computing power to drive more functionalities for longer device lifetime. User will benefit from the ultimate experience of having richer graphic display, higher resolution and 32-bit color, and ultra-low power (ULP) analog microphone (AMIC) for always-on voice command applications.


Ultra-Low Supply Current

4 μA/MHz executing from MRAM (with cache)

4 μA/MHz executing from SRAM

Low power sleep mode with RTC and 8KB SRAM 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)


MIPI DSI 1.2 with 2 data lanes up to 500 Mbps

Up to 640 x 480 resolution

4 layers with alpha blending

Frame Buffer Decompression


2D/2.5D graphics accelerator

Full Alpha Blending

Texture and Frame Buffer Compression

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, –40°C to 85°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

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

Ordering Information


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