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AVR194
The phase commutation has to be done according to hall sensors value. HallA, HallB and HallC
are connected to external interrupt sources or to the three internal comparators. The compara-
tors generate the same type of interrupts as the external interrupts. Figure 7 shows how the
microcontroller I/O ports are used in the starter kit.
Figure 7. Microcontroller I/O Ports use (SO32 package)
PB2/ADC5/INT1/ACMPN0
PB3/AMP0-
20
27
PB4/AMP0+
PB5/ADC6/INT2/ACMPN1/AMP2-
28
30
Vm'
PB6/ADC7/PSCOUT1B
PB7/ADC4/PSCOUT0B/SCK
31
32
VL
UL
Q4
Q2
PORTC
PC0/INT3/PSCOUT1A
PC1/PSCIN1/OC1B
PC2/T0/TXCAN
PC3/T1/RXCAN
PC4/ADC8/AMP1-/ACMPN3
PC5/ADC9/ACMP3/AMP1+
PC6/ADC10/ACMP1
PC7/D2A/AMP2+
2
7
10
11
21
22
26
29
VH
TxCAN
RxCAN
GNDm
ShCo
H2
DAC_OUT
Q3
Depends on the
communication mode
Current_Shunt-
Current_Shunt+
Hall Sensor 2
DAC_OUT
PORTD
PD0/PSCOUT0A/XCK/SS_A
PD1/PSCIN0/CLKO
PD2/PSCIN2/OC1A/MISO_A
PD3/TXD/TXLIN/OC0A/SS/MOSI_A
PD4/ADC1/RXD/RXLIN/ICP1A/SCK_
A
PD5/ADC2/ACMP2
PD6ADC3/ACMPM/INT0
PD7/ACMP0
1
4
5
6
16
17
18
19
UH
Fault
MISO
MOSI / LIN TxD /
TxD
SCK / LIN RxD / RxD
/ POT
H3
H1
Q1
Not Used with MC300
Depends on the
communication mode
Hall Sensor 3
Hall Sensor 1
PORTE
PE0/RESET/OCD
PE1/OC0B/XTAL1
PE2/ADC0/XTAL2
3
14
15
RST
Quartz CAN
Quartz CAN
Depend on the
communication mode
Vm’ is implemented but not used. It can be used to get the value of the DC bus voltage.
The outputs UH, UL, VH, VL, WH & WL are used to control the power bridge. As previously
seen, they depend on the Power Stage Control (PSC) which generates PWM signals. For such
applications, the recommended mode is the Center Aligned Mode (see Figure 8 ), the register
POCRnRA is used to adjust ADC synchronization for current measurement.
9
8138A–AVR–04/08
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