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Board architecture

UM0432

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Board architecture

The STEVAL-IHM015V1 can be schematized as shown in Figure 4.

Figure 4.

Board architecture

The control board’s core is the ST7MC microcontroller with a dedicated peripheral included

to drive the 3-phase brushless motor.

The user interface is made up of four potentiometers (P1, P2, P3, P4) used to set

parameters related to the specific drive (see Section 7).

Two push-button switches are also implemented.

●

A Reset button for hardware resets.

●

A Start/Stop button used to start and stop the motor drive (seeSection 7).

Two LEDs (green/red), each related to a specific drive, are used to obtain a status on the

system (see Section 7).

In normal functioning mode, the board is supplied by the VBUS connector J5 but an auxiliary

supply connector (J6) is included on the board to feed the drivers and the microcontroller.

The board is supplied with a 2-Kbit EEPROM (M95020) connected to the micro by the SPI

bus. To enable the on-board EEPROM memory, the J2 jumper must be closed and the

debug feature must be disabled inside the firmware. J4 can be set by connecting a jumper

between pins 1-2 or 2-3. This setting is related to a specific drive (see Section 7).

Two communication systems can be established with the microcontroller.

●

ICC: used for programming/debugging purposes.

●

SCI: used for data exchanges through the SDI connector.

ST7MC

Power

Supply

PWMs

Communication

I/O

User Interface

5V..48V

Vdriver

SENSE

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