User manual
Table Of Contents
- Chapter 1. Introduction
- Chapter 2. Getting Started
- Chapter 3. Using the Demo Software
- Appendix A. Board Technical Information
- Figure A-1: PICDEM™ LCD 2 Default Jumper Location
- A.1 Processors
- A.2 LCD Display
- Figure A-2: PICDEM™ LCD 2 Display
- Table A-2: LCD Glass Specifications
- Figure A-3: Display Definitions
- Figure A-4: Digit Description
- Table A-3: LCD SEGx and COMx
- A.2.1 Device-Specific LCD Segment Configuration
- Table A-4: PIC18F85J90 PIM and ICE Pin/Port Comparison
- Table A-5: PIC18F85J90 LCD connections Comparison
- Figure A-5: Segment Configuration for PIC18F85J90 Devices
- Table A-6: PIC18F85j90 pORT AND pIN cOMPARISON
- Table A-7: PIC18F87J90 PIM and ICE Pin/Port Comparison
- Table A-8: PIC18F87J90 LCD connections Comparison
- Figure A-6: Segment Configuration for PIC18F87J90 Devices
- Table A-9: PIC18F87j90 pORT AND pIN cOMPARISON
- Table A-10: PIC18F8490 Pim and ICE Port/Pin Comparison
- Table A-11: pic18f8490 LCD cONNECTIONS cOMPARISON
- Figure A-7: Segment Configuration for PIC18F8490 Devices
- Table A-12: pic18f8490 pIN AND pORT cOMPARISON
- Table A-13: PIC16F946 PIM and ICE PIn/Port Comparison
- Table A-14: PIC16F946 LCD Connections cOMPARISON
- Figure A-8: Segment Configuration for PIC16F946 Devices
- Table A-15: pic16f946 pORT AND PIN cOMPARISON
- Table A-16: PIC16F/LF1946/7 PIM and ICE PIn/Port Comparison
- Table A-17: PIC16F/LF1946/7 LCD Connections cOMPARISON
- Figure A-9: Segment Configuration for PIC16F/LF1946/7 Devices
- Table A-18: pic16f/LF1946/7 pORT AND PIN cOMPARISON
- Table A-19: PIC16F917 PIM and ICE Pin/Port Comparison
- Table A-20: pic16f917 LCD cONNECTIONS cOMPARISON
- Figure A-10: Segment Configuration for PIC16F914/917 Devices
- Table A-21: pic16f917 pIN AND pORT cOMPARISON
- A.3 LED Display
- A.4 Charge Pump and VLCAP
- A.5 Resistive Ladder Versus Charge Pump
- A.6 Oscillator Options
- A.7 RS-232 Serial Port
- A.8 Real-Time Clock
- A.9 Serial EEPROM
- A.10 Analog Input
- A.11 Temperature Sensor
- A.12 Switches
- A.13 ICD Connector
- A.14 Power Supply
- A.15 Board Layout and Schematics
- A.16 PIM Layout and Schematics
- Figure A-16: PIC18F65J90 and PIC18F85J90 PIM Layout
- Figure A-17: PIC16F914/917 PIM Layout
- Figure A-18: PIC16F946 PIM Layout
- Figure A-19: PIC16F/LF1946/7 PIM Layout
- Figure A-20: PIC18F6490/8490 PIM Layout
- Figure A-21: PIC18F87j90 PIM Layout
- Figure A-22: PICDEM™ LCD 2 PIC16F914/917 PIM Schematic
- Figure A-23: PICDEM LCD 2 PIC16F/LF1946/7 64-Pin PIM Schematic
- Figure A-24: PICDEM™ LCD 2 PIC16F946 PIM Schematic
- Figure A-25: PICDEM™ LCD 2 PIC18F6490 64-pin PIM Schematic
- Figure A-26: PICDEM™ LCD 2 PIC18F8490 80-pin PIM Schematic
- Figure A-27: PICDEM™ LCD 2 PIC18F6XJ90 64-pin PIM Schematic
- Figure A-28: PICDEM™ LCD 2 PIC18F87J90 80-pin PIM Schematic
- Figure A-29: PICDEM™ LCD 2 PIC18F85J90 80-pin PIM Schematic
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Board Technical Information
2010 Microchip Technology Inc. DS51662C-page 47
A.6 OSCILLATOR OPTIONS
The on-board firmware uses the internal RC oscillator running at 8 MHz.
• Internal RC oscillator running at 8 MHz can be used.
• Pads provided for user-furnished crystal/resonator (Y2) and two capacitors
(C16 and C17).
• Socket provided for a canned oscillator (Y3). This oscillator can be disabled by
removing jumpers, JP9, JP11 and JP12.
• 32.768 kHz (watch-type) crystal for Timer1 (Y1) is always connected to RC0 and
RC1.
A.7 RS-232 SERIAL PORT
An RS-232 level shifting IC has been provided with all necessary hardware to support
connection of an RS-232 host through the DB9 connector (PI). The port is configured
as DCE and can be connected to a PC using a serial cable.
A.8 REAL-TIME CLOCK
This circuit allows the user to configure a PIC microcontroller for timekeeping using a
32.768 kHz clock crystal connected to Timer1 module’s T1OSO and T1OSI pins.
A.9 SERIAL EEPROM
A socket for a Microwire EEPROM is provided on the board to illustrate usage of
the Synchronous mode of operation of the USART module. For its operation:
• Jumpers, JP15 and JP16, should be connected.
• In the jumper, J6, U9-CS should be connected with RB5.
• In the jumper, J13, U9-ORG (pin 6) should be connected to GND.
A.10 ANALOG INPUT
A 10 k potentiometer is connected through a series of 100 resistors to AN0. The
potentiometer can be adjusted from V
CC to GND. The jumper, J11, should be
connecting the potentiometer to AN0.
Note 1: For the PIC18F85J90 and PIC18F87J90 PIM, the RG2 and RG3 pins are
connected to RC3 and RC4 of U1A, respectively.
2: For the PIC16F917 PIM, the RD1 and RD2 pins are connected to RC3
and RC4 of U1A, respectively.
3: For the PIC18F8490, PIC16F946 and PIC16F/LF/1946/7 PIMs, the RC3
and RC4 pins are connected to RC3 and RC4 of U1A, respectively.