Intro 01 Features 02 Specifications 03 Documents 04 Buy 04

Apollo3 Blue Plus 01

Purposed-built to offer more compute and storage, the Apollo3 Blue Plus has become the most popular system on chip for wearables. Now, with the proprietary secureSPOT^®, it will provide a Secure-by-Design™ environment throughout the device’s lifecycle from the OEM to the end users.

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Block Diagram for the Ultra-Low Power Apollo3 Blue Plus SoC

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Leveraging Ambiq’s proprietary turboSPOT^® technology platform, the Apollo3 Blue Plus SoC increases the computational capabilities of its integrated Arm^® Cortex^®-M4 processor with Floating Point Unit to 96 MHz while lowering the active power consumption to < 6 μA/MHz. This combination dramatically reduces energy consumption while still enabling abundant application processing power to add greater capability and extended life to battery-operated devices. Purpose-built for wearables, the Apollo3 Blue Plus includes an integrated DMA engine, QSPI interface, and advanced stepper motor control for ultra-low power analog watch hand management. In addition, the Apollo3 Blue Plus comes with a dedicated second core for the ultra-low power Bluetooth^® Low Energy 5 connectivity platform, providing superior RF throughput and leaving plenty of resources available for user applications. The Apollo3 Blue Plus adds two additional MSPI modules (3 total) and increases the external memory execute-in-place (XiP) aperture from 64MB to 96MB (32MB/MSPI instance). Other upgrades include internal flash from 1MB to 2MB; SRAM from 384KB to 768KB (TCM size remains at 64KB); and the GPIO count from 50 to 74.

The Apollo3 Blue Plus also forms the core of Ambiq’s Voice-on-SPOT (VoS) platform, making it the perfect microprocessor for enabling always-on voice assistant integration and command. With the new Apollo3 Blue Plus Secure, OEMs have the option to offer additional security by implementing Ambiq’s secureSPOT^® on the most popular SoC. The secureSPOT is Ambiq’s technology platform with optimized hardware and software to provide a Secure by Design environment to device OEMs. secureSPOT 1.0, available now in the Apollo3 Blue Plus, includes secure boot, secure over-the-air (OTA) and wired updates, secure debug, and key revocation, among other features, to protect product design against cyber-attacks and unauthorized cloning. Contact sales@ambiq.com to inquire about the Apollo3 Blue Plus Secure today.

Feature Highlights 02

Ideal Solution

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

Integrated Bluetooth Low Energy 5 Radio

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

Multiple Serial Protocol Support

A host processor can communicate with the Apollo3 Blue Plus SoC over its serial slave port using the I²C, SPI or I²S protocol.

High Energy Efficiency

turboSPOT^® technology allows applications to meet critical timing as/when needed while still providing extremely high energy efficiency operation.

Scalable SAR ADC

A scalable SAR ADC monitors the temperature sensor, several internal voltages, and up to 8 external sensor signals.

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.

Optimized PWM

Supports highly optimized PWM pattern generation for complex, efficient stepper motor control operation.

Software Tool Suite

Supported by a complete suite of standard software development tools to shorten development times.

Specifications

Specifications 03

Ultra-Low Supply Current
6 μA/MHz executing from flash or RAM at 3.3 V
1 μA deep sleep mode (Bluetooth Low Energy Off) with RTC at 3.3 V (Bluetooth Low Energy in SD)

High-Performance Arm Cortex-M4 Processor
Up to 48 MHz nominal clock frequency with 96 MHz performance TurboSPOT Mode
Floating Point Unit (FPU)
Memory Protection Unit (MPU)
Wake-up interrupt controller (WIC) with 32 interrupts

Apollo3 Blue Plus
AMA3B2KK-KBR BGA

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Apollo3 Blue Plus<br>Evaluation Board<br>AMA3B2EVB

Apollo3 Blue Plus
Evaluation Board
AMA3B2EVB

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Apollo3 Blue Plus<br>Voice-on-SPOT Kit<br>AMA3BPVOS

Apollo3 Blue Plus
Voice-on-SPOT Kit
AMA3BPVOS

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Apollo3 Blue Plus
AMA3B2KK-KBR BGA

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Apollo3 Blue Plus
Evaluation Board
AMA3B2EVB

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Apollo3 Blue Plus
Voice-on-SPOT Kit
AMA3BPVOS

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Integrated Bluetooth Low Energy Module
RF sensitivity: -93 dBm (typical)

Ultra-Low Power Memory
Up to 2MB of flash memory for code/data
Up to 768KB of low power RAM for code/data
16KB 2-way Associative/Direct-Mapped Cache

Ultra-Low Power Interface for On- and Off-Chip Sensors
14-bit ADC, 14 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
ISO7816 Secure interface
1x 2/4/8-bit and 2x 2/4-bit SPI master interface (MSPIs)
6x I²C/SPI masters for peripheral communication
1x I²C/SPI slave for host communications
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 (48/96 MHz)
RTC based on Ambiq’s AM08X5/18X5 family

Wide Operating Range
1.755-3.63 V, -40°C to 85°C

Applications
Voice-on-SPOT compatible for always-listening keyword detect, audio command recognition and voice assistant integration in battery-powered devices including: - Bluetooth^® headsets, earbuds, and truly wireless earbuds - Remote and Gaming Controls - Smart home
Wearables including smart watches and fitness/activity trackers
Hearing aids, Digital Health Monitoring and Sensing Devices
Smart Home Automation, Security and Lighting control applications