Features
■ Compatible with Bluetooth v5.1, ETSI EN 300
328 and EN 300 440 Class 2 (Europe), FCC
CFR47 Part 15 (US) and ARIB STD-T66
(Japan)
■ Supports up to three BLE connections
■ Typical cold boot to radio active 35 ms
■ Processing power
□ 16 MHz 32-bit Arm® Cortex-M0+ with
SWD interface
□ 18300 EEMBC IoTMark-BLE®
score
□ Dedicated Link Layer and AES-128
Encryption Processor
□ Software-based True Random Number
Generator (TRNG)
■ Memories
□ 32 kB One-Time-Programmable (OTP)
□ 48 kB Retainable System RAM
□ 144 kB ROM
■ Power management
□ Integrated Buck/Boost DCDC converter
□ Buck: 1.1 V ≤ VBAT_HIGH ≤ 3.3 V (min 1.8V
OTP read needed)
□ Boost: 1.1 V ≤ VBAT_LOW ≤ 1.65 V
□ Clock-less hibernation mode: Buck 270
nA, Boost 240 nA
□ Built-in temperature sensor for die
temperature monitoring
■ Clocks
□ 32 MHz crystal and 32 MHz RC osc.
□ 32 kHz crystal and 32/512 kHz RC osc.
□ 15 kHz RCX as crystal replacement
■ Programmable Reset Circuitry
■ 2× General purpose Timers with capture and
PWM capabilities
■ Digital interfaces
□ GPIOs: 6 (WLCSP17), 12 (FCGQFN24)
□ 2× UARTs (one with flow control)
□ SPI Master/Slave up to 32 MHz (Master)
□ I2C bus at 100 kHz and 400 kHz
□ 3-axis capable Quadrature Decoder
□ Keyboard controller
■ Analog interfaces
□ 4-channel 10-bit ADC
■ Radio transceiver
□ Fully integrated 2.4 GHz CMOS
transceiver
□ Single wire antenna
□ TX: 3.5 mA, RX: 2.2 mA (system currents
with DC-DC, VBAT_HIGH =3 V and 0 dBm)
□ Programmable transmit output power from
-19.5 dBm to +2.5 dBm
□ -94 dBm receiver sensitivity
■ Packages:
□ WLCSP 17 balls, 1.7 × 2.05, 0.5 mm pitch
□ FCGQFN 24 pins, 2.2 × 3, 0.4 mm pitch

Applications
■ Medical applications
■ Disposables
■ Beacons
■ Proximity tags and trackers
■ Wireless sensor nodes
□ Fitness trackers
□ Consumer health
■ Smartwatches
■ Human interface devices (HID)
□ Stylus pens
□ Keyboards
□ Mouse devices
□ Trackpads
■ Toys
■ Industrial appliances