pic32mx320f032h Microchip Technology Inc., pic32mx320f032h Datasheet - Page 93

• Manufacturer Part Number: pic32mx320f032h
• Description: 64/100-pin General Purpose And Usb 32-bit Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

21.0
The PIC32MX RTCC module is intended for applica-
tions in which accurate time must be maintained for
extended periods of time with minimal or no CPU inter-
vention. Low-power optimization provides extended
battery lifetime while keeping track of time.
FIGURE 21-1:
© 2009 Microchip Technology Inc.
32.768 kHz Input
from Secondary
Oscillator (SOSC)
Note:
REAL-TIME CLOCK AND
CALENDAR (RTCC)
reference source. Refer to the “PIC32MX
This data sheet summarizes the features of
the PIC32MX3XX/4XX family of devices. It
is not intended to be a comprehensive
Family Reference Manual” Section 29.
“Real-Time Clock and Calendar (RTCC)”
(DS61125) for a detailed description of this
peripheral.
The manual is available from the Microchip
web site (www.Microchip.com/PIC32).
Alarm
Event
RTCC BLOCK DIAGRAM
Compare Registers
RTCC Prescalers
Repeat Counter
RTCC Timer
Comparator
with Masks
0.5s
RTCC Interrupt Logic
Preliminary
ALRMVAL
RTCVAL
Following are some of the key features of this module:
• Time: Hours, Minutes and Seconds
• 24-Hour Format (Military Time)
• Visibility of One-Half-Second Period
• Provides Calendar: Weekday, Date, Month and
• Alarm Intervals are configurable for Half of a
• Alarm Repeat with Decrementing Counter
• Alarm with Indefinite Repeat: Chime
• Year Range: 2000 to 2099
• Leap Year Correction
• BCD Format for Smaller Firmware Overhead
• Optimized for Long-Term Battery Operation
• Fractional Second Synchronization
• User Calibration of the Clock Crystal Frequency
• Calibration Range: ± 0.66 Seconds Error per
• Calibrates up to 260 ppm of Crystal Error
• Requirements: External 32.768 kHz Clock Crystal
• Alarm Pulse or Seconds Clock Output on RTCC
Year
Second, One Second, 10 Seconds, One Minute,
10 Minutes, One Hour, One Day, One Week, One
Month and One Year
with Auto-Adjust
Month
pin
PIC32MX3XX/4XX
RTCOE
Seconds Pulse
Alarm Pulse
RTCC Interrupt
YEAR, MTH, DAY
HR, MIN, SEC
HR, MIN, SEC
MTH, DAY
WKDAY
WKDAY
DS61143F-page 91
RTCC Pin