Apollo2 Blue 01

Apollo2 Blue MCU EVB AMA3B1KK-KK

The Apollo2 MCU is an ultra-low power, highly integrated microcontroller designed for battery-powered and portable, mobile devices. At the heart of the Apollo2 Blue MCU is Ambiq’s patented Subthreshold Power Optimized Technology (SPOTTM) and a powerful Arm® Cortex®-M4 processor with Floating Point Unit.

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Apollo2 Blue MCU EVB Drawing
Apollo2 Blue MCU EVB AMA3B1KK-KK

Block Diagram for the Ultra-Low Apollo2 Blue MCU

Block Diagram for Apollo2 Blue MCU
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This combination dramatically reduces energy consumption while still enabling abundant application processing power to add greater capability and extended life to battery-operated devices. With unprecedented levels of energy efficiency, the Apollo2 can deliver always-on keyword detection and voice assistant integration, local voice control, complex sensor processing, gesture recognition and activity monitoring applications within the smallest power budget.
By combining ultra-low power sensor conversion electronics with the powerful Arm Cortex-M4 processor with Floating Point Unit, the Apollo2 Blue MCU enables complex sensor processing tasks to be completed with unprecedented battery life. Weeks, months, and years of battery life are achievable while doing complex context detection, gesture recognition, and activity monitoring.

Features Highlights 02

Ideal Solution

An ideal solution for battery-powered applications requiring sensor measurement and data analysis.

Integrated BLE5 Radio

Serves as an applications processor for one or more sensors and has a fully integrated BLE 5 radio.

ADC with Analog and Digital Outputs

Can measure analog sensor outputs using an integrated ultra-low power 10-bit ADC and digital sensor outputs using the integrated serial master ports.

Multiple Serial Protocol Support

A host processor can communicate with the Apollo2 MCU over its serial slave port using the I2C, SPI or I2S protocol.

Extended Battery Life

Enables months and years of battery life for products only achieving days or months of battery life today.

Greater Performance

Implementation of the Cortex-M4F core delivers both greater performance and much lower power than 8-bit, 16-bit, and other comparable 32-bit cores.

Uniquely Tuned ADC

ADC is uniquely tuned for minimum power with a configurable measurement mode that does not require MCU intervention.

Software Tool Suite

Supported by a complete suite of standard software development tools.


Specifications 03

Ultra-Low Supply Current

< 10 μA/MHz executing from flash at 3.3 V

< 10 μA/MHz executing from RAM at 3.3 V

< 3 μA deep sleep mode with RTC at 3.3 V (Bluetooth in shutdown)

High-Performance Arm Cortex-M4 Processor

Up to 48 MHz clock frequency

Floating Point Unit (FPU)

Memory Protection Unit (MPU)

Wake-up interrupt controller with 32 interrupts

Apollo2 Blue AMA2B1KK-KLR

Apollo2 Blue AMA2B1KK-KLR


Integrated Bluetooth® Wireless Technology BLE5-Compliant Low-Energy Sub-System

RF sensitivity: -95 dBm

Tx: 5 mA @ 0 dBm, Rx: 3.5 mA

Tx output power: -40 dBm to +5 dBm

AES 128-bit encryption

Over-The-Air updates (OTA)

Coexistence with other 2.4 GHz wireless

Bluetooth SIG profiles support

Enhanced data rate up to 2 Mbps feature capable

Built-in 32 kHz RCOU Ultra-low Power Memory

Up to 1MB of flash memory for code/data

Up to 256KB of low power RAM for code/data

16KB 2-way Associative Cache

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

14-bit ADC, 11 selectable input channels available

Up to 2.67 MS/s sampling rate

Voltage Comparator (VCOMP)

Temperature sensor with ±3°C accuracy after calibration

Ultra-Low Power Flexible Serial Peripherals

4x I2C/SPI masters with 128-byte bidirectional FIFO for communication with sensors, radios, and other peripherals

1x I2C/SPI slave for host communications with 256-bytes LRAM area for FIFO/host support

2x UART modules with 32-location Tx and Rx FIFOs

PDM for mono and stereo audio microphones

1x 12S slave for PDM audio pass-through

Rich Set of Clock Sources

32.768 kHz crystal (XTAL) oscillator

Low Frequency RC (LFRC) oscillator (1.024 kHz)

High Frequency RC (HFRC) oscillator (48 MHz)

RTC based on Ambiq’s AM08X5/18X5 family

Wide Operating Range

1.755-3.63 V, -40°C to 85°C


Wearable electronics including smart watches

Activity and fitness monitors

Wireless sensors

Consumer electronics


Light control applications

Remote sensing

Wireless mice and keyboards

Motion and tracking devices

Alarms and security system

Home automation


Package Option

4 mm x 4 mm x 0.9 mm 64-pin LGA with up to 31 GPIO

Ordering Information

AMA2B1KK-KLR (256KB RAM, 64-pin LGA)


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Documents 04

Where To Buy 05


Fujitsu Electronics Pacific Asia Limited Singapore Branch

[email protected]

Southeast Asia


[email protected]

Fujitsu Electronics Pacific Asia Limited Singapore Branch

[email protected]

China and Hong Kong

Direct Sales

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Fujitsu Electronics Inc (FEI)

[email protected]


[email protected]


Direct Sales

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TOP-electronics USA

[email protected]


Direct Sales

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Direct Sales

[email protected]

Sechang Semicon Co., Ltd. – Sales Representative

[email protected]