ATAVRMC310 Atmel, ATAVRMC310 Datasheet - Page 8

• Manufacturer Part Number: ATAVRMC310
• Description: BOARD EVAL MOTOR CTRL W/MEGA32M1
• Manufacturer: Atmel
• Series: AVR®r

Specifications of ATAVRMC310

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATmega32M1
• Primary Attributes: 3-Ph BLDC, Brushed DC, Stepper Motor- Controller Board
• Secondary Attributes: Requires ATAVRMC300 Power Driver Board
• Processor To Be Evaluated: ATmega32M1
• Data Bus Width: 8 bit
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4. Hardware Description
8
AVR194
This application has been developed and tested with ATAVRMC300 and ATAVRMC310 boards.
The ATAVRMC300 board is the power board which embeds the bridge while the ATAVRMC310
is the processor board built arround the ATmega32M1 processor.
Refer to the ‘AVR430: MC300 Hardware User Guide’ and ‘AVR470: MC310 Harware User
Guide’ in depth descriptions of these two boards. The schematics are also available with these
application notes.
Figure 4-1.gives a block diagram of the ATAVRMC310 used with an ATAVRMC300 board.
Figure 4-1.
As shown in
can be seen as a Pulse Width Modulator with six output signals. To avoid cross conduction a
Dead Time control is integrated (see ATmega32M1 datasheet for more information about PSC
or
A fault input (Over_Current) is linked to PSCIN. This fault input enables the microcontroller to
disable all PSC outputs.
Figure 6. Hardware implementation
It’s possible to measure the current with two differential amplified channels with programmable
5, 10, 20 and 40 gain stage. The Shunt resistor has to be adjusted to the amplifier conversion
range.
The Over_Current signal comes from an internal comparator. The comparator’s reference can
be adjusted by the internal DAC.
Figure 8
ATAVRMC310
Processor Board
ATmega32M1
(ATmega32M1)
AMP1+;AMP1-
below).
PSC : Power Stage Controller
ACMPi : Analog Comparator Positive input (i = 0,1,2)
AMPi+/- : Analog Differential Amplified channel Positive/Negative inputs (i = 0,1,2)
Figure 6
ACMP0
ACMP1
ACMP2
PSCIN0
ATAVRMC310 & ATAVRMC300 connection
PSC
the microcontroller contains a Power Stage Controller (PSC). The PSC
PSCOUT0A
PSCOUT0B
PSCOUT0C
PSCOUT1A
PSCOUT1B
PSCOUT1C
Over_Current
Current
Shunt resistor
Power Bridge
+
ATAVRMC300
Power Board
(bridge)
HallA
HallB
HallC
PH_A
PH_B
PH_C
Motor
8138A–AVR–04/08