UM0855 datasheet(27/35 Pages) STMICROELECTRONICS

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UM0855

Supported commands

Doc ID 16617 Rev 1

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7.2.3

Stop command (DWM only)

The *stop command interrupts any acquisition session that has been started with either the

*start or *debug commands.

Note:

This is a digital working mode only command.

7.2.4

Zon and Zoff

The *Zon and *Zoff commands are employed, respectively, to put into 3-state (i.e. high-

impedance) and to remove from 3-state (i.e. normal mode) the lines of the ST72651AR6

microcontroller mounted on the demonstration kit. These commands allow the isolation of

the sensor from the microprocessor and permit the user to interact with the sensor in a

purely analog way.

By default, when the kit is turned on the lines are in 3-state mode (or AWM) and the user is

required to send the command *Zoff to allow communication between the sensor and the

microcontroller (or DWM).

7.2.5

Device name

The *dev command retrieves the name of the device mounted on the demonstration kit

connected to the PC. The returned value is, e.g.,

“LPR430AL”.

7.2.6

Firmware version

The *ver command queries the demonstration kit and returns the version of the firmware

loaded in the microprocessor, e.g., “PR430AL 1.08”

7.3

Quick start

This section provides the basic sequence of commands to start a data communication

session and to retrieve the yaw rate data from the demonstration kit, running in digital

working mode:

Connect the STEVAL-MKI0xxV1 to the USB port.

Start Microsoft Hyper Terminal and configure it as described in

Section 7.1.

Inside the Hyper Terminal window, enter the command *Zoff to enable control of the

device by the ST72651AR6 microcontroller.

Send the *debug command to get the yaw rate data measured by the sensor.

Send *stop to end the continuous acquisition and visualization.

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