Diglient Pmod ToF Time of Flight Sensor

Features and Specifications

• Optimized low-power modes
• Enables proximity detection and distance measurement
• 16-bit resolution
• Onboard EEPROM to save the calibrations
• 6-pin Pmod connector with I2C interface
• 1.8 V to 3.3V Logic Levels
• Pass-through Pmod host port for daisy chaining
• Product Compliance- HTC: 8473301180 / ECCN: EAR99

The Pmod ToF is a sensor that enables optical distance sensing at low power. It can measure distances of up to 5 meters and has up to 16-bits of resolution. The on-chip digital signal processor on the ISL29501 calculates the time it takes for light emitted by the ToF to travel to the target and back, which is proportional to the distance to the target. The sensing is done by an external emitter (LED) and detector (Photodiode) using the principle of Square Wave Modulated Indirect Time of Flight (SWM-ITOF) in the frequency domain and obtains distance measurements from the phase shift.

The Pmod ToF communicates with the host board via the I²C protocol. Users can read and write Pmod ToF registers by first sending the 7-bit I²C address of 01010111 (0x57) and then a read/write bit (high/low logic level, respectively), followed by the register address of interest at a maximum clock frequency of 400 kHz. This allows for the implementation of configuration, calibration, and reading of measurements from the Pmod ToF. Header J2 on the Pmod ToF is a pass-through for all of the signals present on the main Header J1 to allow for the daisy chaining of multiple I²C compatible modules.

Pmod Series Overview

The Digilent Pmod (peripheral module) Series is a small, low-cost peripheral module that can be used with a wide range of embedded systems and development boards. It is designed to extend the capabilities of embedded systems and development boards by adding new features and functionality. The Pmod communicates with host boards using 6, 8 or 12-pin connectors that can carry multiple digital control signals, taking advantage of standard serial protocols such as SPI and I²C. This allows for more effective designs by routing analog signals and power supplies only where they are needed and away from digital controller boards.

What's in the Box

• Pmod ToF
• Custom Digilent Pmod packaging