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3.3.1
Input Power Connector (J6, BP1-BP2)
The dsPICDEM MCSM Development Board receives the power for control circuits from
a +24V power supply. The 24V supply is always needed as it supplies 15V and 3.3V
necessary for the dsPIC DSC and for the interface between the dsPIC DSC and the
power stage. The power stage DC bus voltage can be connected to the development
board through the J6 or BP1-BP2 connectors.
3.3.2
DC Bus Power Supply Connector (J5 and J7)
By default, jumper J5 is short and jumper J7 is open, and the +24V input power supply
connected to J6 supplies both the control circuits and the DC bus voltage to the
development board. If jumper J7 is short and jumper J5 is open, the BP1-BP2
connectors supply the DC bus voltage to the development board power stage and J6
supplies the control circuits.
The 0-80V ADC power supply can be connected between BP1-BP2.
3.3.3
USB Interface (J4)
The development board uses an on-board PIC18 interface as a bridge between the
UART and the USB. The PIC18 UART pins are connected to the dsPIC33F devices on
different ports depending on the specific dsPIC33F device used. For the specific
devices that do not have remappable peripherals, additional UART RX/TX are
available on the device designated port for UART communication.
For dsPIC DSC devices that have an embedded USB port, populate R7, R8, R9 and
R10 with 0 Ω resistors, and disable the PIC18 USB communication by removing R84
and R85.
3.3.4
ICSP Connector for dsPIC DSC (J1/J2)
The MPLAB ICD 3 and MPLAB REAL ICE Connector is an RJ11 female connector (J1)
that connects the MPLAB ICD 3 or MPLAB REAL ICE In-Circuit Debugger to the
dsPIC33F device for programming and debugging purposes. The PICkit 3 In-Circuit
Debugger/Programmer can be connected to the board using a 6-pin ICSP
connector (J2).
3.3.5
ICSP for PIC18 (J3)
J3 is a 6-pin connector that connects the PICkit 3 In-Circuit Debugger/Programmer to
the PIC18F device. The development board uses the on-board PIC18 interface as a
bridge between the UART and USB. The PIC18F can be programmed for USB
communication.
3.3.6
Motor Connector (J8)
The motor connector has eight terminals. Table 3-5 lists the functionality of each terminal.
TABLE 3-5:
MOTOR CONNECTOR DETAILS
Terminal Number
1
2
3
4
5
6
7
8
? 2009 Microchip Technology Inc.
Designator
NC
M1
DC+
M2
M3
DC+
M4
NC
Description
Not connected
Motor wire 1 (phase 1)
DC bus voltage
Motor wire 2 (phase 1)
Motor wire 3 (phase 2)
DC bus voltage
Motor wire 4 (phase 2)
Not connected
DS70610A-page 25
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