General Description：

The DA14531 is an ultra-low power SoC integrating a 2.4 GHz transceiver and an Arm® Cortex-M0+microcontroller with a RAM of 48 kB and a One-Time Programmable (OTP) memory of 32 kB. It canbe used as a standalone application processor or as a data pump in hosted systems.The radio transceiver, the baseband processor, and the qualified Bluetooth® low energy stack is fullycompliant with the Bluetooth® Low Energy 5.1 standard.The DA14531 has dedicated hardware for the Link Layer implementation of BLE and interfacecontrollers for enhanced connectivity capabilities.The BLE firmware includes the L2CAP service layer protocols, Security Manager (SM), AttributeProtocol (ATT), the Generic Attribute Profile (GATT), and the Generic Access Profile (GAP). Allprofiles published by the Bluetooth® SIG as well as custom profiles are supported.The device is suitable for disposables, wireless sensor nodes, beacons, proximity tags and trackers,smart HID devices (stylus, keyboards, mice, and trackpads), toys, and medical and industrialapplications.

Key Features：

■ Compatible with Bluetooth v5.1, ETSI EN 300328 and EN 300 440 Class 2 (Europe), FCCCFR47 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+ withSWD interface

□ 18300 EEMBC IoTMark-BLE® score

□ Dedicated Link Layer and AES-128Encryption Processor

□ Software-based True Random NumberGenerator (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 ifOTP read needed)

□ Boost: 1.1 V ≤ VBAT_LOW ≤ 1.65 V

□ Clock-less hibernation mode: Buck 270nA, Boost 240 nA

□ Built-in temperature sensor for dietemperature 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 andPWM 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 CMOStransceiver

□ Single wire antenna

□ TX: 3.5 mA, RX: 2.2 mA (system currentswith 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