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PICDEM? LCD 2 Demonstration Kit User’s Guide
1.2
PICDEM LCD 2 DEMONSTRATION BOARD HARDWARE FEATURES
The PICDEM LCD 2 Demonstration Board has the following hardware features; each
feature’s number corresponding to the number in Figure 1-1:
1. 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 sup-
plied with a PIM populated with a PIC18F85J90 device.
Note:
Optional PIMs populated with PIC18FXX90, PIC18FXX90, PIC16F9XX,
and PIC16X19XX devices are available for purchase from Microchip Direct
(www.microchipdirect.com).
The MPLAB ICE can be plugged onto the board without any transition socket for
PIC18FXX90 devices. For other devices, a transition socket may be needed.
2. On-board adjustable voltage regulator for direct input from 9V, 100 mA AC/DC
wall adapter or 3V button cell battery.
3. Jumper J15 to select different power options.
4. Green power-on indicator LED for direct input from 9V.
5. Varitronix custom segmented LCD display.
6. Jumpers, COM0, COM1, COM2 and COM3, to disconnect COM pins from
on-board LCD and allow the usage of any customized LCD glass.
7. RS-232 connection and associated hardware for direct connection to RS-232
interface.
8. Jumpers, JP13 and JP14, to disconnect TX and RX.
9. In-Circuit Debugger (ICD) connector.
10. R44, 10 k ? , potentiometer for devices with analog inputs.
11. Five push button switches (S1 through S5) for external stimulus and Reset.
12. Jumpers, JP19, JP18, JP1 and JP2, to disconnect switches from RB6, RB7, RA6
and RA7 input pins.
13. Jumper, J11, to select either 10 k ? (POT R44) or the S1-S4 switches to AN0
(RA0).
14. Two green LEDs connected to RC3 and RC4 (device dependent).
15. Jumpers in J14 to disconnect LEDs from RC3 and RC4.
16. A slide switch (S6) to select either the resistor ladder or the charge pump option
for generating the bias values for the LCD pins.
17. Jumper, JP21, to physically tie the resistor ladder to ground.
18. Unpopulated holes provided for crystal connection.
19. Jumpers, JP11 and JP12, to disconnect crystal from OSC1 and OSC2.
20. 32.768 kHz crystal with Timer1 for Real-Time Clock (RTC) operation.
21. A Microwire EEPROM 93AA46C provided on a socket.
22. 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.
23. Thermistor for sensing temperature.
24. Jumper, JP5, to connect thermistor to AN1 (RA1) (device dependent).
25. Jumper, JP17, to select either V CC or I/O to power the peripherals.
26. Unpopulated option for TC77 temperature sensor.
27. Prototype area for user hardware.
28. 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.)
DS51662C-page 12
? 2010 Microchip Technology Inc.
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