STEVAL-MKI091V1 STMicroelectronics, STEVAL-MKI091V1 Datasheet - Page 17

• Manufacturer Part Number: STEVAL-MKI091V1
• Description: DEMO BOARD FOR LIS331DLM
• Manufacturer: STMicroelectronics
• Series: MEMS, nanor

Specifications of STEVAL-MKI091V1

• Sensor Type: Accelerometer, 3 Axis
• Sensing Range: ±2g, 4g, 8g
• Interface: I²C, SPI
• Sensitivity: 64LSB/G, 32LSB/g, 16LSB/g
• Embedded: No
• Utilized Ic / Part: LIS331DLM
• Acceleration: 2 g, 4 g, 8 g
• Sensing Axis: Triple Axis
• Interface Type: I2C, SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: LIS331DLM
• Other names: 497-10491

LIS331DLM
5
5.1
Digital interfaces
The registers embedded inside the LIS331DLM may be accessed through both the I
SPI serial interfaces. The latter may be SW configured to operate either in 3-wire or 4-wire
interface mode.
The serial interfaces are mapped onto the same pads. To select/exploit the I
line must be tied high (i.e. connected to Vdd_IO).
Table 8.
I
The LIS331DLM I
content can also be read back.
The relevant I
Table 9.
There are two signals associated with the I
data line (SDA). The latter is a bidirectional line used for sending and receiving the data
to/from the interface. Both the lines are connected to Vdd_IO through a pull-up resistor
embedded inside the LIS331DLM. When the bus is free both the lines are high.
The I
normal mode.
2
C serial interface
Transmitter
2
Pin name
Receiver
C interface is compliant with fast mode (400 kHz) I
Master
Term
Slave
SDO
SDO
SPC
SDA
SCL
SA0
SDI
CS
Serial interface pin description
Serial interface pin description
2
C terminology is given in the table below.
2
C is a bus slave. The I
SPI enable
I
I
SPI serial port clock (SPC)
I
SPI serial data input (SDI)
3-wire interface serial data output (SDO)
I
SPI serial data output (SDO)
The device which sends data to the bus
The device which receives data from the bus
The device which initiates a transfer, generates clock signals and terminates a
transfer
The device addressed by the master
2
2
2
2
C/SPI mode selection (1: I
C serial clock (SCL)
C serial data (SDA)
C less significant bit of the device address (SA0)
Doc ID 15102 Rev 4
2
C is employed to write data into registers whose
2
C bus: the serial clock line (SCL) and the serial
2
C mode; 0: SPI enabled)
Pin description
Description
2
C standards as well as with the
Digital interfaces
2
C interface, CS
2
C and
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