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SAM R34/R35

SAM R34/R35 Low Power LoRa® Sub-GHz SiP Datasheet

Introduction

The SAM R34/R35 is a family of ultra-low power microcontrollers combined with a UHF transceiver

communication interface. It uses a 32-bit ARM® Cortex® -M0+ processor and offers up to 256 KB of

Flash and 40 KB of SRAM, including an area of battery backed-up SRAM. The UHF transceiver supports

LoRa® and FSK modulation. LoRa technology is a spread spectrum protocol optimized for low data-rate,

ultra-long range signaling. It is ideal for battery-powered remote sensors and controls.

The SAM R34 includes an integrated microcontroller with USB and the UHF transceiver, making it

suitable for USB dongle applications or for software updates via USB. The SAM R35 offers the same

microcontroller functions along with the UHF transceiver without the USB interface.

Features

Operational Features

• Processor:

–ARM Cortex -M0+ CPU running at up to 48 MHz (2.46CoreMark®/MHz)

–Single-Cycle Hardware Multiplier

–Micro Trace Buffer (MTB)

• Memory:

–In-System Self-Programmable Flash Memory, with options for sizes - 256 KB, 128 KB or 64 KB

–Static Random Access Memory (SRAM) with options for sizes - 32 KB, 16 KB or 8 KB

–Low power SRAM Memory with option for sizes - 4 KB or 8 KB

• System:

–Power-on Reset (POR) and Brown-out Reset

–Internal and External Clock Options with 48 MHz Digital Frequency Locked Loop (DFLL48M)

and 48 MHz to 96 MHz Fractional Digital Phase Locked Loop (FDPLL96M)

–External Interrupt Controller (EIC)

–Up to 16 External Interrupts

–One Non-Maskable Interrupt

–Two Pin Serial Wire Debug (SWD) Programming, Test and Debugging Interfaces

•Operating Voltage: 1.8V- 3.6V

•Low Power Consumption

– Transceiver:

•RX = 16 mA (typical)

•RFO_HF = 33 mA (typical)

•PA_BOOST = 95 mA (typical)

© 2019 Microchip Technology Inc. DatasheetDS70005356C-page 1

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