UM0432 Datasheet, PDF (14/53 Pages) STMicroelectronics – Low voltage motor control demonstration board

Board architecture
6
Board architecture
The STEVAL-IHM015V1 can be schematized as shown in Figure 4.
Figure 4. Board architecture
5V..48V
UM0432
Power
Supply
Vdriver
5V
User Interface
ST7MC
PWMs
Communication
I/O
M
H
R_SENSE
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 V_BUS 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.
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