Instructions

2 Functional description
The acceleration sensor evaluation board supports the standard I
2
C communication inter-
face.
• A positive supply voltage is applied to the sensor through VDD pin and I/O supply
voltage for digital interface through VDD_IO pin. The VDD and VDD_IO pins on the
board are connected together using 0Ω resistor R1.
• The I
2
C communication is enabled by connecting CS pin to VDD_IO. The CS pin is
connected to VDD_IO using 100kΩ resistor R3.
• The 7-bit slave address of the acceleration sensor is 001100xb. LSB of the 7-bit slave
address can be modified using the SAO pin.
By default the 7-bit slave address of the acceleration sensor on the evaluation
board is 0011001b (0x19). i.e. SAO pin of the sensor is connected to VDD_IO
using 100kΩ resistor ADR.
The 7-bit slave address of the acceleration sensor can be changed to
0011000b (0x18) by removing 100kΩ resistor ADR from ’1’ part and mount-
ing it on the ’0’ part of the evaluation board. i.e. SAO pin is connected to GND
using 100kΩ resistor ADR.
Pin
No.
Evaluation
board pins
Sensor
pins
Description Input/Output
1 SCL SCL I
2
C serial clock Input
2 CS CS I
2
C enable/disable Input
3 SAO SAO I
2
C device address selection Input
4 SDA SDA I
2
C serial data Input/Output
5 NC NC No connection -
6 GND GND Negative supply voltage Supply
7 RSVD RSVD Reserved, connect to GND Input
8 GND GND Negative supply voltage Supply
9 VDD VDD Positive supply voltage Supply
10 VIO VDD_IO Positive supply voltage for I/O pins Supply
11 I1 INT_1 Interrupt pin 1 Input/Output
12 I0 INT_0 Interrupt pin 0 Output
Table 1: Pin description
3-Axis Acceleration Sensor Evaluation Board, Part Nr. 2533203301691
User manual version 1.1 © April 2020
www.we-online.com/sensors 5