Microchip ATSAML10E15A-MU, 32bit ARM Cortex M23 Microcontroller, SAML10, 32MHz, 32 kB Flash, 32-Pin VQFN

Power Arm® Cortex®-M23 MCU consuming less than 25 uA/MHz in active mode and less than 100 nA in sleep mode. It features enhanced peripheral touch controller, advanced analog, ISO7816 smart card interface, event system and Sleep Walking peripherals. SAML10 achieved EEMBC Certified ULPMark score of 405

Processor:
ARM Cortex®-M23
32 MHz (2.62 CoreMark/MHz and up to 31 DMIPS)
Single-cycle hardware multiplier
Hardware divider
Nested Vector Interrupt Controller (NVIC)
Memory Protection Unit (MPU)
Operating Voltage Range:
1.62V to 3.63V