DM300018 datasheet(99/115 Pages) MICROCHIP

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Hardware

DS51558A-page 93

14.1.10

External Connection Headers

Two 40-pin headers, H8 and H9, allow the user to connect hardware external to the

dsPICDEM 2 Development Board into the circuit.

The schematic of the external connection headers is shown in Figure

A-6: “dsPICDEM™ 2 Development Board Schematic (Sheet 5 of 7)”.

14.1.11

Analog Temperature Sensor

Temperature sensor, U5, is a -40°C to +125°C linear output TC1047A connected to

analog channel AN3 of the dsPIC30F device through header H10. The header H10

allows the temperature sensor output to be fed to dsPIC30F devices in the Motor

Control family (M ALL position) or the General Purpose and Sensor family (GP ALL

position). The output of the temperature sensor is fed directly to the dsPIC DSC device.

The output voltage range for the TC1047A is typically 750 mV at +25°C. The TC1047A

exhibits a typical 10 mV/C voltage slope.

The schematic of the temperature sensor is shown in Figure A-6: “dsPICDEM™ 2

Development Board Schematic (Sheet 5 of 7)”

14.1.12

Analog Potentiometer

Potentiometer, R15, is connected to analog channel, AN2, of the dsPIC30F devices via

header H13. The voltage output range for the potentiometer is between 0VDC and VDD

(+5VDC). The voltage source is provided by VR1 or TP1. The header, H13, allows the

potentiometer output to be fed to dsPIC30F devices in the Motor Control family (M ALL

position) or the General Purpose and Sensor family (GP ALL position)

The schematic of the analog potentiometer circuit is shown in Figure

A-6: “dsPICDEM™ 2 Development Board Schematic (Sheet 5 of 7)”.

14.1.13

Reset Switch

The Reset switch (S1) is connected to the MCLR pin on all device sockets, as well as

the LCD and LCD controller (dsPIC30F2011). The Reset switch circuit is shown in

Figure A-7: “dsPICDEM™ 2 Development Board Schematic (Sheet 6 of 7)”.

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