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dsPICDEM? 1.1 Plus Development Board User’s Guide
Oscillator selection parameters are shown in Table 5-2.
TABLE 5-2: OSCILLATOR SELECTION PARAMETERS (1)
Oscillator Selection on
dsPICDEM? 1.1 Plus
Demo Board
Crystal (X3)
Mini Crystal (X2)
Canned Oscillator (U5)
RC
External Clock
Modifications on dsPICDEM? 1.1 Plus Demo Board
R33, R34, R20, C20, C21 and X2 open, U5 empty.
Crystal in X3, caps in C33 and C37.
R20, R33, R34, C33, C37 and X1 open, U5 empty.
Crystal in X2, caps in C20 and C21.
R20, R33, R34, C20, C21, C33, C37, X2 and X3 open,
U5 installed.
R33, R34, C20, C21, C33, X2 and X3 open, U5 empty.
Cap in C37 and resistor in R20.
R20, C20, C21, C33, C37, U5, X2 and X3 open. 0 ohm
installed for R33 and R34.
Note
5.1.16
1:
The oscillator circuit schematics are shown in Figure
A-2: “dsPICDEM? 1.1 Plus Development Board Schematic (Sheet 1
of 5)”
Reset Switch
By placing J10 jumper in the MCLR1 position, the Reset switch connected to the
processor MCLR pin provides a hard Reset to the dsPIC DSC device. By placing J10
jumper in the MCLR2 position, the Reset switch is connected to the PIC18F242 LCD
controller.
The Reset switch circuit is shown in Figure A-2: “dsPICDEM? 1.1 Plus Develop-
ment Board Schematic (Sheet 1 of 5)” .
5.1.17
Prototyping Area
A prototyping area and associated header are provided on the development board to
enable additional ICs and attachment boards to be added (see Figure
A-2: “dsPICDEM? 1.1 Plus Development Board Schematic (Sheet 1 of 5)” ).
5.1.18
Sample Devices
A sample dsPIC DSC device programmed with the demonstration code is included in
the dsPICDEM? 1.1 Plus Development Board Kit. The 80-pin TQFP is soldered to a
1.5” x 1.5” adaptor PCB, which is inserted onto the emulation header, J11 and J13-J15.
Handle the device carefully when inserting and extracting the adaptor board. The
orientation of the adaptor board is important. The Microchip logo and device part
numbering should be aligned to read from left to right before insertion of the adaptor
board. The pin 1 index marker of dsPIC30F device should align with the lower left
45° corner of the 80-pin QFP footprint (pin 1 of Emulation Header J14).
Pin-out information for the emulation header is shown in Figure A-2: “dsPICDEM?
1.1 Plus Development Board Schematic (Sheet 1 of 5)” .
DS70099D-page 66
? 2006 Microchip Technology Inc.
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