MA240026 Microchip Technology, MA240026 Datasheet - Page 199

• Manufacturer Part Number: MA240026
• Description: Daughter Cards & OEM Boards PIC24FJ16MC102 Plug-In Module
• Manufacturer: Microchip Technology

Specifications of MA240026

• Rohs: yes
• Data Bus Width: 16 bit
• Description/function: PIC24F 28 Pin QFN to 100 Pin Plug-in-Module
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3 V to 3.6 V

21.0
This chapter discusses the Real-Time Clock and
Calendar (RTCC) module, which is available on
PIC24FJ16MC101/102 devices, and its operation.
FIGURE 21-1:
© 2011 Microchip Technology Inc.
Note 1: This data sheet summarizes the features
32.768 kHz Input
from SOSC Oscillator
2: It
3: Some registers and associated bits
REAL-TIME CLOCK AND
CALENDAR (RTCC)
of the PIC24FJ16MC101/102 family of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 29. “Real-Time
Clock
(DS39696)
Reference Manual”, which is available on
the
(www.microchip.com).
specifications in
cal Characteristics”
supercede any specifications that may be
provided in PIC24F Family Reference
Manual sections.
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization”
this data sheet for device-specific register
and bit information.
is
important
Microchip
and
RTCC BLOCK DIAGRAM
Alarm
Event
in
RTCC Clock Domain
the
Compare Registers
Section 26.0 “Electri-
Calendar
RTCC Prescalers
Repeat Counter
to
RTCC Timer
Comparator
with Masks
of this data sheet,
“PIC24F
note
web
0.5s
that
RTCC Interrupt Logic
(RTCC)”
Family
site
the
Preliminary
in
CPU Clock Domain
ALRMVAL
ALCFGRPT
Some of the key features of the RTCC module are:
• 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
The RTCC module is intended for applications where
accurate time must be maintained for extended periods
of time with minimum to no intervention from the CPU.
The RTCC module is optimized for low-power usage to
provide extended battery lifetime while keeping track of
time.
The RTCC module is a 100-year clock and calendar
with automatic leap year detection. The range of the
clock is from 00:00:00 (midnight) on January 1, 2000 to
23:59:59 on December 31, 2099.
The hours are available in 24-hour (military time)
format. The clock provides a granularity of one second
with half-second visibility to the user.
RCFGCAL
RTCVAL
PIC24FJ16MC101/102
RTCOE
Alarm Pulse
RTCC Interrupt
DS39997B-page 199
RTCC Pin