User Manual

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4.2.1

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Backboard LEDs

Five LEDs are mounted to give visual feedback on the sensor. Table 2 lists the functionality

of each LED:

LED

Description

PWR (orange)

Power indicator, on when 5V connected

Rx/Tx (red/green)

UART receive and transmit indicators

LED 0 / LED 1

For internal use only



4.2.2



Electrical characteristics

DC electrical characteristics

Parameter

Minimum

Typical*

Maximum

Power supply

Voltage input (V)

Current consumption (mA)

4.75

130

*180

5.25

240

Interface logic levels

(referenced to +3V3)

LOW

HIGH

2.3

* Value recorded while reading a target at 2m distance. NB: this value depends on ambient

conditions, distance and target reflectivity

4.3I2C protocol information

The communication parameters are:

Frequency: 400kHz

Primary Address Length: 7-bit

Primary Slave Address: 0x31

Built-in pull-up resistors: 10kOhms on SDA and SCL (avoid additional pull-up

resistors on the same bus to prevent transmission problems)

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