UM0855 datasheet(9/35 Pages) STMICROELECTRONICS

9 / 35 page

UM0855

Working modes

Doc ID 16617 Rev 1

9/35

Note:

Not connected for single axis devices

The JP9 and JP8 (for double axis devices only; see

Figure 3, ref 6 and ref 11) jumpers allow

the management of external (HP and LP) filters, respectively, for Out2 and Out1.

Note:

Not connected for single axis devices.

2.2

Digital working mode (DWM)

When the board is configured for DWM, it can be controlled by a PC through the dedicated

GUI. The USB works as an interface channel between the PC and demonstration kit board

by means of the microcontroller. The microcontroller takes advantage of its on-board 8-bit

A/D converter to read analog values from the device and to convert them in digital values,

then sends them to the PC via the USB channel.

For the board to work in DWM, the jumpers must be configured as described in

Table 4.

Users can interact with the board by means of the STEVAL-MKI0xxV1 GUI and/or

Microsoft© Hyper Terminal (refer to

Section 4 and Section 7).

Table 2.

Jumper configurations for JP1 and JP6 in AWM

Jumper on 1-2 position

Jumper on 2-3 position

JP11

1xOut1 (not amplified): on J3-pin 3 (Out1)

4xOut1 (amplified): on J3-pin 3 (Out1)

JP6

1xOut2 (not amplified): on J3-pin 4 (Out2)

4xOut2 (amplified): on J3-pin 4 (Out2)

Table 3.

Jumper configurations for JP9 and JP8 in AWM

Configuration

Function

pin 1-2 short

pin 3-4 short

HP and LP filters enabled

pin 2-4 open

pin 3-4 short

HP and LP filters bypassed

Table 4.

Jumper configuration for DWM

Jumper

JUMPER position

JP4 ST

2-3 (default) or not connected

JP5 PD

2-3 (default) or not connected

JP7 HP

2-3 (default) or not connected

JP1 and JP6

Refer to

Table 1

JP9 and JP8

Refer to

Table 3

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