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dsPIC33CK Low-Voltage Motor Control Board User’s Guide
DS50002927A-page 26
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2020 Microchip Technology Inc.
Amplified Currents from External Amplifiers: U5 and U15
IA_EXT 16 OA1OUT/AN0/CMP1A/
IBIAS0/RA0 Dedicated ADC
Core #0 Phase Current A amplified by the amplifier
U5-A; when using this output, populate the
resistor R121 (0R), remove the resistor R125 if
populated and disable dsPIC DSC Operational
Amplifier #1
IB_EXT 41 OA2OUT/AN1/AN7/ANA0/
CMP1D/CMP2D/CMP3D/
RP34/SCL3/INT0/RB2 Dedicated ADC
Core #1 Phase Current B amplified by the amplifier
U5-B; when using this output, populate the
resistor R129 (0R), remove the resistor R133,
if populated and disable dsPIC DSC
Operational Amplifier #2
IBUS_EXT 23 OA3OUT/AN4/CMP3B/
IBIAS3/RA4 Shared ADC Core Bus current amplified by the amplifier U15;
when using this output, populate the resistor
R137 (0R), remove the resistor R141, if popu-
lated and disable dsPIC DSC Operational
Amplifier #3
Overcurrent Detection and Fault Output
IBUS_FILT_EXT 21 DACOUT1/AN3/CMP1C/RA3 High-Speed Analog
Comparator #1
(CMP #1) and
DAC #1
Amplified bus current is further filtered prior to
connecting to the positive input of the CMP #1
used for overcurrent detection. Overcurrent
threshold can be set through DAC. Comparator
output is internally available as Fault input of the
PWM Generators so that it can be used for
shutting down PWMs without CPU intervention.
Voltage Feedbacks
V_BUS 33 AN15/CMP2A/IBIAS2/RP51/
PMD11/PMA11/RC3 Shared ADC Core DC bus voltage feedback
V_A 30 AN17/ANN1/IBIAS1/RP54/
PMD12/PMA12/RC6 Shared ADC Core Phase A voltage feedback
V_B 19 AN23/RE3 Shared ADC Core Phase B voltage feedback
V_C 17 AN22/RE2 Shared ADC Core Phase C voltage feedback
Temperature Feedbacks and Potentiometer (POT #1 – Speed Reference)
TEMP_LOCAL 15 AN12/ANN0/RP48/RC0 Shared ADC Core MOSFET die temperature sensed by
MCP9700 (U14) can be used for thermal
protection
TEMP_EXT 58 TDO/AN2/CMP3A/RP39/
SDA3/RB7 Shared ADC Core Feedback from external temperature sensor
interfaced via connector J9
SPEED_
REFERENCE 61 PGC1/AN11/RP41/SDA1/RB9 Shared ADC Core Potentiometer (POT1) can be used for setting
the speed reference in motor control application
Hall Sensor Feedbacks (Interfaced via Connector J7)
HALL_A 42 RE8 I/O Ports and
Change
Notification (CN) Change Notification interrupt can be enabled
to identify the transitions of any of the Hall
sensor inputs
HALL_B 44 RE9
HALL_C 57 RE10
Quadrature Encoder Feedbacks (Interfaced via Connector J8)
QEI_A 5 RP60/PWM8H/PMD7/RC12 Remappable
feature of I/O and
QEI
QEI module can be configured to read position
or speed information based on the encoder
signals as required by the motor control
application
QEI_B 6 RP61/PWM8L/PMA5/RC13
QEI_INDEX 7 RP62/PWM6H/PMA4/RC14
QEI_HOME 8 RP63/PWM6L/PMA3/RC15
Debug Interface (J6, J5 or PKOB)
DEBUG_RX 13 RP78/PCI21/RD14 Remappable
function of I/O and
UART These signals are connected to MCP2200
(U13), header J5 and PKOB; connect and
disconnect appropriate jumper resistors to
establish serial communication via any of
these channels
DEBUG_TX 14 ANN2/RP77/RD13
TABLE 2-14: dsPIC
®
DSC PIN FUNCTIONS (CONTINUED)
Signal
dsPIC
®
DSC
Pin #
dsPIC DSC Pin Function
dsPIC DSC
Peripheral
Remarks