PICDEM LCD 2 Demonstration Board
The PICDEM LCD 2 Demonstration Board (DM163030) shows the main features of 28, 40, 64 and 80-pin LCD Flash PIC microcontrollers including the LCD voltage booster and contrast controller. It is populated with the PIC18F87J90. Other devices are supported via a transition socket and are available separately. A sample LCD glass display is included for custom prototyping. The glass features 7-segment displays, wipers, thermometers, star bursts, and other common icons.
The PIC18F87J90 family combines the traditional advantages of all PIC18 microcontrollers namely, high computational performance and a rich feature set with a versatile, on-chip LCD driver. All of the devices in the PIC18F87J90 family incorporate a range of features that can significantly reduce power consumption during operation. Key items include Alternate Run Modes, multiple Idle Modes, on-the-Fly Mode Switching.
The PIC18F87J90 family offer six different oscillator options, allowing users a range of choices in developing application hardware. It provides ample room for application code, from 64 Kbytes to 128 Kbytes of code space. The Flash cells for program memory are rated to last up to 10,000 erase/write cycles
Key Applications:
- Voltmeter
- A/D module measures the voltage of the on board potentiometer and displays a voltage between 0.00V and 3.30V on the LCD.
- Thermometer
- The A/D module measures the voltage of the thermistor and converts to temperature both in Celsius and Fahrenheit to continuously display the temperature.
- Clock
- Timer/Clock function shows hours:minutes:seconds with a moving second hand using on board 32 kHz watch crystal.
- Charge Pump and Software Contrast
- When using the PIC18F87J90 family of devices the LCD module can be configured as a charge pump and software contrast control is activated.
Features
- The demonstration board provides a daughter board option for the PIC18F85J90, PIC18F87J90, PIC18F8490, PIC16F914/917, PIC16F946, and PIC16F/LF1946/47 families of devices and MPLAB ICE. The board is also supplied with a PIM populated with a PIC18F85J90 device.
- On-board adjustable voltage regulator for direct input from 9V, 100 mA AC/DC wall adapter or 3V button cell battery.
- Jumper J15 to select different power options.
- Green power-on indicator LED for direct input from 9V.
- Varitronix custom segmented LCD display.
- Jumpers, COM0, COM1, COM2 and COM3, to disconnect COM pins from on-board LCD and allow the usage of any customized LCD glass.
- RS-232 connection and associated hardware for direct connection to RS-232 interface.
- Jumpers, JP13 and JP14, to disconnect TX and RX.
- In-Circuit Debugger (ICD) connector.
- R44, 10 kΩ, potentiometer for devices with analog inputs.
- Five push button switches (S1 through S5) for external stimulus and Reset.
- Jumpers, JP19, JP18, JP1 and JP2, to disconnect switches from RB6, RB7, RA6 and RA7 input pins.
- Jumper, J11, to select either 10 kΩ - (POT R44) or the S1-S4 switches to AN0 (RA0).
- Two green LEDs connected to RC3 and RC4 (device dependent).
- Jumpers in J14 to disconnect LEDs from RC3 and RC4.
- A slide switch (S6) to select either the resistor ladder or the charge pump option for generating the bias values for the LCD pins.
- Jumper, JP21, to physically tie the resistor ladder to ground.
- Unpopulated holes provided for crystal connection.
- Jumpers, JP11 and JP12, to disconnect crystal from OSC1 and OSC2.
- 32.768 kHz crystal with Timer1 for Real-Time Clock (RTC) operation.
- A Microwire EEPROM 93AA46C provided on a socket.
- Jumpers, JP15 and JP16, to disconnect EEPROM from CK and DT. Jumper, J6, to connect CS to GND or to RC4 (device dependent). Jumper, J13, to select either 128 x 8 or 64 x 16 memory organization.
- Thermistor for sensing temperature.
- Jumper, JP5, to connect thermistor to AN1 (RA1) (device dependent).
- Jumper, JP17, to select either VCC or I/O to power the peripherals.
- Unpopulated option for TC77 temperature sensor.
- Prototype area for user hardware.
- PICtail™ daughter board connection. (The pin names on the board are valid only for the PIC18F8490 device. For other devices, the PICtail daughter board pin connections may be different or not connected.)
Ships With
- PICDEM LCD 2 Demonstration Board
- Sample Plug-in Module (PIM)
- CD-ROM which contains:
- Sample Programs
- “PICDEM™ LCD 2 Demonstration Kit User’s Guide”