DWM1001 Datasheet

© Decawave Ltd 2017

Subject to change without notice

Version 1.5

Page 5

The block diagram on page 1 of this data sheet shows the major sections of the DWM1001. An overview of these

blocks is given below.

1.1 UWB Transceiver DW1000

The module has a DW1000 UWB transceiver mounted on the PCB. The DW1000 uses a 38.4 MHz reference

crystal. The crystal has been trimmed in production to reduce the initial frequency error to approximately 3 ppm,

using the DW1000 IC’s internal on-chip crystal trimming circuit.

Always-On (AON) memory can be used to retain DW1000 configuration data during the lowest power operational

states when the on-chip voltage regulators are disabled. This data is uploaded and downloaded automatically. Use

of DW1000 AON memory is configurable.

The on-chip voltage and temperature monitors allow the host to read the voltage on the VDDAON pin and the

internal die temperature information from the DW1000.

See the DW1000 Datasheet [2] for more detailed information on device functionality, electrical specifications and

typical performance.

1.2 Bluetooth® Microprocessor Nordic nRF52832

The nRF52832 is an ultra-low power 2.4 GHz wireless system on chip (SoC) integrating the nRF52 Series 2.4

GHz transceiver and an ARM Cortex-M4 CPU with 512kB flash memory and 64kB RAM.

See the nRF52832 Datasheet[1] for more detailed information on device functionality, electrical specifications and

typical performance.

1.3 Power Supply and Power management

The power management circuit consists of a switch mode regulator. It is a buck convertor or step-down convertor.

The input voltage to the DWM1001 can be in the range 2.8V to 3.6V. Outputs from the convertor provides 1.8V

which is required by the DW1000[2]

1.4 Three Axis Motion Detector STMicroelectronics LIS2DH12TR

The LIS2DH12 is an ultra-low-power high performance three-axis linear accelerometer with digital I2C/SPI serial

interface standard output. The LIS2DH12 has user-selectable full scales of ±2g/±4g/±8g/±16g and is capable of

measuring accelerations with output data rates from 1 Hz to 5.3 kHz. The self-test capability allows the user to

check the functionality of the sensor in the final application. The device may be configured to generate interrupt

signals by detecting two independent inertial wake-up/free-fall events as well as by the position of the device itself.

The LIS2DH12 is guaranteed to operate over an extended temperature range from -40 °C to +85 °C.

See the LIS2DH12TR Datasheet[4] for more detailed information on device functionality, electrical specifications

and typical performance.

1.5 Software on board

The DWM1001C modules are delivered without firmware - blank -.

The DWM1001 modules come pre-loaded with embedded firmware which provides two-way ranging (TWR) and

real time location system (RTLS) functionality. See the details in the DWM1001 Firmware User Guide [6]. The

module can be configured and controlled via its API, which can be accessed through a number of different

interfaces, allowing flexibility to the product designer. The details of the API are described in the DWM1001

Firmware API Guide [5]. Decawave also provides the module firmware in the form of binary libraries and some

source code. A build environment is provided, so that the user can customise the operation and if required add

their own functions[6].