User manual

PIC18F87J72 Evaluation Board User’s Guide

If the evaluation board is used in programmer mode, then the waveforms and the

response can be observed on the GUI. If the evaluation board is used in debugging

mode, using the MPLAB IDE, then the user can see the response on the Data Monitor

and Control Interface (DMCI) window.

For debugging, the Real ICE/ICD debugger and programmer is connected to the RJ11

connector. After the software is compiled and programmed to the PIC18F87J72 device,

the program can be executed. The LCD display on the board will indicate the time and

the waveforms that can be observed on the GUI window or DMCI. The LCD display on

the board will indicate the time. The various waveforms applied at the input can be

observed on the GUI or DMCI.

Various changes to the device configuration can be done using the touch sensitive keys

S1, S2, S3 and S4. The on-chip CTMU peripheral is used for all the touch-sensitive

keys.

Press the key S1, to change the Over Sampling Ratio (OSR) as shown in Figure 3-1.

There are four OSR configurations that can be created using S1. Each press of the key

S1 will change the configuration of the sigma delta ADC with OSR values from a value

of 256, 128, 64 and 32.

The time from the RTCC can also be displayed using the key S1 as shown in

Figure 3-2.

The RTCC date and time can be set using the following steps:

• Press the keys S2 and S4 simultaneously to enter into the RTCC date setting

mode. The date field on the LCD will start blinking.

• The date can be changed by pressing the key S4 for incrementing and S2 for

decrementing. The key S1 can be used to set the day, month and year fields.

• Press the keys S1 and S2 simultaneously, to enter into the RTCC time setting

mode. The time field on the LCD will start blinking.

• The time can be changed by pressing the key S4 for incrementing and S2 for

decrementing. The key S1 can be used to set the hour, minute and second fields.

By pressing the key S1 repeatedly, the OSR configurations will sequentially change

from 256 to 32 and then back to 256.

FIGURE 3-2: Displaying Time and Date

Press S1 to

view time

Display showing Time