PIC24FJ128GA010_09 Datasheet, PDF (157/240 Pages) Microchip Technology – 64/80/100-Pin General Purpose, 16-Bit Flash Microcontrollers

PIC24FJ128GA010 FAMILY
18.0 REAL-TIME CLOCK AND
CALENDAR (RTCC)
Note:
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. Refer to Section 29. “Real-Time
Clock and Calendar (RTCC)” (DS39696)
in the “PIC24F Family Reference Manual”
for more information.
The Real-Time Clock and Calendar hardware module
has the following features:
• Time: Hours, Minutes and Seconds
FIGURE 18-1:
RTCC BLOCK DIAGRAM
• 24-Hour Format (Military Time)
• Calendar: Weekday, Date, Month and Year
• Alarm Configurable
• Year Range: 2000 to 2099
• Leap Year Correction
• BCD Format for Compact Firmware
• Optimized for Low-Power Operation
• User Calibration with Auto-Adjust
• Calibration Range: ±2.64 Seconds Error per
Month
• Requirements: External 32.768 kHz Clock Crystal
• Alarm Pulse or Seconds Clock Output on RTCC
pin
RTCC Clock Domain
32.768 kHz Input
from SOSC Oscillator
RTCC Prescalers
0.5s
Alarm
Event
RTCC Timer
Comparator
Compare Registers
with Masks
Repeat Counter
CPU Clock Domain
RCFGCAL
ALCFGRPT
RTCVAL
ALRMVAL
YEAR
MTHDAY
WKDYHR
MINSEC
ALMTHDY
ALWDHR
ALMINSEC
RTCC Interrupt Logic
RTCC Interrupt
Alarm Pulse
RTCOE
RTCC Pin
© 2009 Microchip Technology Inc.
DS39747E-page 157