DM240313 Microchip Technology, DM240313 Datasheet - Page 20

• Manufacturer Part Number: DM240313
• Description: BOARD DEMO 8BIT XLP
• Manufacturer: Microchip Technology
• Series: XLP™r
• Type: MCUr

Specifications of DM240313

• Contents: Board
• Data Bus Width: 8 bit
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC16, PIC18
• Silicon Core Number: PIC16F, PIC18F
• Kit Contents: Board
• Features: 32 Character Backlit LCD Display, Temperature Sensor
• Rohs Compliant: Yes
• Silicon Family Name: PIC18FxxKxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

XLP 8-Bit Development Board User’s Guide
DS41581A-page 20
2.2.1.3
In Sleep mode, the CPU and peripherals are off. In this Power-Saving mode the device
is fully asleep. The only events which can wake it from Sleep are the Watchdog Timer
(WDT), Brown-out Reset (BOR), Secondary Oscillator SOSC, RTCC, ULPWU and
I/O-based interrupts. In our demonstration program the WDT and BOR have been dis-
abled in the configuration (fuses). The RTCC and ULPWU are not used in the program
and should be considered disabled, and SOSC has been disabled for Sleep mode
(enabled in Conserve mode).
In this mode, the device is consuming the least amount of current possible. To escape
Sleep mode the user has only to press RB1 (Select) at any time; this acts as INT1, inter-
rupts wakes the device from Sleep. It is important to remember that the SOSC has
been disabled, and thus the clock is no longer keeping accurate time. Upon exiting, the
user will return to the “8-Bit XLP Main Menu” and the clock will begin to count again. To
return the clock to an accurate time, the user will have to set it to the correct time. (Set-
tings  Time  Set Time).
2.2.1.4
The demonstration program includes a time-out function. The time-out function is pas-
sive and thus runs in the program background while navigating the menu system. If the
user fails to do an action within a minute, the system will go to Sleep until woken up by
a RB1 button press. In this mode of Sleep the system will continue to keep track of time
but the LCD will remain off as well as all other module functions.
The final selection under the “8-Bit XLP Main Menu” is the Settings Menu, which will
take the user into the custom preference options within the demonstration program. A
program symbol legend can be seen in
FIGURE 2-5:
2.2.2
From the settings menu location, the user has the option to create a custom user pref-
erence for the features involved with time, frequency, temperature and the LCD. After
modifying the demonstration program the user can select “Save Custom” under the set-
tings menu to store the custom preferences to the on-board serial EEPROM. This
allows the demonstration program to start with the user’s personal settings already in
place at start-up.
2.2.2.1
Under the time settings the user has the option to set clock, toggle clock standard, set
alarm, toggle alarm enable, choose wake-up intervals and choose display length when
woken up.
By choosing Set Time, the user will be able to increment hours and minutes as per ini-
tial setup. Please note that if Sleep mode is entered, then Set Time has to be entered
to re-adjust the clock to make it accurate.
SLEEP MODE
TIME-OUT MODE
Settings Menu
TIME SETTINGS
> Text <
Symbol
[ Text ]
A
P
*
Figure
Feature Enable
Alarm is active
Select Cursor
Function
2-5.
AM
PM
 2011 Microchip Technology Inc.