Apollo4 01

Apollo4 SoC EVB

The Apollo4 SoC family is the 4th generation system processor solution built upon the Ambiq® 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. Moreover, designers can securely develop and deploy products confidently with our secureSPOT® technology and PSA-L1 certification.

Securely develop and deploy products with confidence

Apollo4 SoC EVB

Block Diagram for the Ultra-Low Power Apollo4 SoC

More Information

With up to 192 MHz clock frequency enabled by Ambiq's turboSPOT®, Apollo4 can achieve power efficiency as low as 5 µA/MHz 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.

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)

Security Features

Secure boot

Secure OTA and wired updates

Secure debug

Secure key storage

Hardware crypto accelerators


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 454 x 454 resolution

4 layers with alpha blending

Frame Buffer Decompression


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

32 MHz-32 kHz Crystals (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


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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