Ultra-low supply current

• <10 μA/MHz executing from flash at 3.3 V
• <10 μA/MHz executing from RAM at 3.3 V

High-performance ARM Cortex-M4 Processor

• Up to 48 MHz clock frequency
• Floating point unit
• Memory protection unit
• Wake-up interrupt controller with 32 interrupts

Ultra-low power memory:

• Up to 1 MB of flash memory for code/data
• Up to 256 KB of low leakage RAM for code/data
• 16kB 1 or 2-way Associative Cache

Ultra-low power interface for off-chip sensors:

• 14 bit, 15-channel, up to 1.2 MS/s ADC
• Voltage Comparator
• Temperature sensor with +/-2ºC accuracy

Flexible serial peripherals:

• 6x I2C/SPI master for communication with sensors, radios, and other peripherals
• 1x I2C/SPI slave for host communications
• 2x UART for communication with peripherals and legacy devices
• PDM for mono and stereo audio microphone

Rich set of clock sources:

• 32.768 kHz XTAL oscillator
• Low frequency RC oscillator – 1.024 kHz
• High frequency RC oscillator – 48 MHz
• RTC based on Ambiq’s AM08X5/18X5 families

Wide operating range: 1.8-3.6 V, –40 to 85°C

Compact package options:

• 2.5 x 2.5 mm 49-pin CSP with 34 GPIO
• 4.5 x 4.5 mm 64-pin BGA with 50 GPIO

• Wearable electronics
• Wireless sensors
• Activity and fitness monitors
• Consumer electronics
• Consumer medical devices
• Smart watches
• Smart Home/IoT devices