Datasheet

 2005-2012 Microchip Technology Inc. DS39747F-page 163
PIC24FJ128GA010 FAMILY
19.0 REAL-TIME CLOCK AND
CALENDAR (RTCC)
The Real-Time Clock and Calendar hardware module
has the following features:
• Time: Hours, Minutes and Seconds
• 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
FIGURE 19-1: RTCC BLOCK DIAGRAM
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.
RTCC Prescalers
RTCC Timer
Comparator
Compare Registers
Repeat Counter
YEAR
MTHDAY
WKDYHR
MINSEC
ALMTHDY
ALWDHR
ALMINSEC
with Masks
RTCC Interrupt Logic
RCFGCAL
ALCFGRPT
Alarm
Event
32.768 kHz Input
from SOSC Oscillator
0.5s
RTCC Clock Domain
Alarm Pulse
RTCC Interrupt
CPU Clock Domain
RTCVAL
ALRMVAL
RTCC Pin
RTCOE