UM0855 datasheet(8/35 Pages) STMICROELECTRONICS

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Working modes

UM0855

8/35

Doc ID 16617 Rev 1

Working modes

The STEVAL-MKI0xxV1 demonstration board is designed to be used in two different

working modes:

●

Analog working mode (AWM): the microcontroller on the board is disabled and the

analog outputs of the device are available to the user on the dedicated connector

(

Figure 3, ref 7). This is the default working mode when power is applied either through

the USB connector or through the supply connector (

Figure 3, ref 10).

●

Digital working mode (DWM): the microcontroller on the board is enabled and allows

the user to digitally acquire the output signals of the device, to see them on the PC

through the dedicated GUI and to manage the control pins of the device.

Each working mode requires a board setup, which is done by correctly setting the jumpers

labeled JP4, JP5, JP7 (see ref 1, ref 2 and ref 3, respectively, in

Figure 3) and the jumpers

labeled JP1 and JP6 (see ref 4 and ref 5, respectively, in

Figure 3).

2.1

Analog working mode (AWM)

AWM is the working mode activated by default when the board is connected to a PC by USB

or when the power supply is applied to J10. The microcontroller on the board is disabled and

board behavior can be controlled through the dedicated jumpers.

In this working mode, the power down (PD), self-test (ST) and high-pass filter reset (HP)

functions are respectively managed by JP4, JP5 and JP7 as described below (see

Figure 3

to identify the jumpers):

Analog output signals can be measured respectively through pin 3 (marked Out1), pin 4

(marked Out2, for single-axis devices only) and pin1 (GND) of the J3 header (see

Figure 3,

ref 7).

The JP1 and JP6 jumpers allow the user to select which output signal is available on J3.

Table 1.

Jumper configurations for power down (PD), self-test (ST) and high pass

filter reset (HP) in AWM

Jumper on 1-2 position

Jumper on 2-3 position

JP4

Logic level 1: self-test ON

Logic level 0: self-test OFF, default

JP5

Logic level 1: power down mode

Logic level 0: normal mode, default

JP7

Logic level 1: external high-pass filter reset

Logic level 0: normal mode, default

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