dsPICDEM? 1.1 Development Hardware
4.1.12
Emulation Header
Headers J11 and J13-J15 provide a connection to the MPLAB ICE 4K In-Circuit
Emulator. The emulation headers also support Plug-in Modules containing dsPIC30F
devices soldered onto adaptor boards (see Section 4.1.18). These Plug-in Modules
facilitate quick change out of the 80-pin TQFP device.
The schematic of the Emulation Header is shown in Figure A-3: “dsPICDEM 1.1
4.1.13
Power Supply
The dsPICDEM 1.1 is powered by a +9V AC/DC wall adapter. Separate +5V DC
regulators (V DD and AV DD ) are provided to their respective processor pins and
prototyping area. Separate ground planes are connected through a single point.
Jumpers VDD_JMP and AVDD_JMP allow the supplied power source to be bypassed
and alternate supplies to be provided.
The schematics of the power supply circuits are shown in Figure A-3: “dsPICDEM 1.1
4.1.14
Power-on Indicator
A green LED is connected to the input of the regulators to indicate the presence of
4.1.15
Oscillator Options
? Crystal oscillator (7.3728 MHz) is supplied with the development board.
? Through holes and pads are provided for a user-furnished watch-type crystal and
two capacitors for SOSC1 and SOSC2.
? Socket and pads are provided for an output pull-up resistor for user furnished
oscillator to processor.
? External clock connections from J1.
Oscillator selection parameters are shown in Table 4-2.
TABLE 4-2: OSCILLATOR SELECTION PARAMETERS
Oscillator Selection on
dsPICDEM 1.1 Demo Board
Crystal (X3)
Mini Crystal (X2)
Canned Oscillator (U5)
RC
External Clock
Modifications on dsPICDEM 1.1 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.
The oscillator circuit schematics are shown in Figure A-2: “dsPICDEM 1.1
? 2003 Microchip Technology Inc.
Advance Information
DS70099B-page 45
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