DS3231MEVKIT# Maxim Integrated, DS3231MEVKIT# Datasheet - Page 8

• Manufacturer Part Number: DS3231MEVKIT#
• Description: Clock & Timer Development Tools DS3231M EVAL KIT
• Manufacturer: Maxim Integrated
• Type: RTCr

Specifications of DS3231MEVKIT#

• Product: Evaluation Kits
• Tool Is For Evaluation Of: DS3231M
• Frequency: 1 Hz, 32.768 kHz
• Operating Supply Voltage: 2.3 V to 5.5 V
• Interface Type: I2C
• Part # Aliases: 90-3231M#KIT

DS3231M
The DS3231M is a serial real-time clock (RTC) driven by
an internal, temperature-compensated, microelectrome-
chanical systems (MEMS) resonator. The oscillator pro-
vides a stable and accurate reference clock and main-
tains the RTC to within Q0.432 seconds-per-day accu-
racy from -45NC to +85NC. The RTC is a low-power clock/
calendar with two programmable time-of-day alarms. INT/
SQW provides either an interrupt signal due to alarm
conditions or a 1Hz square wave. The clock/calendar
provides seconds, minutes, hours, day, date, month,
and year information. The date at the end of the month
is automatically adjusted for months with fewer than
±5ppm, I
8
8 SO
7
8
PIN
16 SO
V
GND
SDA
V
RST
SCL
BAT
CC
15
16
NAME
SDA
SCL
N
2
Detailed Description
R
PU
C Real-Time Clock
DS3231M
Serial-Data Input/Output. This pin is the data input/output for the I
pin requires an external pullup resistor. The pullup voltage can be up to 5.5V, regardless of the
voltage on V
Serial-Clock Input. This pin is the clock input for the I
data movement on the serial interface. The pullup voltage can be up to 5.5V, regardless of the
voltage on V
INTERFACE
CONTROL
POWER
I
2
C
CC
CC
.
.
RESONATOR
TIME-BASE
SENSOR
TEMP
CONTROL AND STATUS
REGISTERS
DIVIDER
FACTORY TRIM
ADJUSTMENT
31 days, including corrections for leap year. The clock
operates in either the 24-hour or 12-hour format with an
AM/PM indicator. The internal registers are accessible
though an I
ed voltage reference and comparator circuit monitors the
level of V
switch to the backup supply when necessary. The RST
pin provides an external pushbutton function and acts as
an indicator of a power-fail event.
The Block Diagram shows the device’s main elements.
Each of the major blocks is described separately in the
following sections.
DIGITAL
FUNCTION
CLOCK/CALENDAR
CC
WITH ALARM
2
to detect power failures and to automatically
Pin Description (continued)
1Hz
C bus interface. A temperature-compensat-
2
C serial interface and is used to synchronize
INTERRUPT
SELECT
OR 1Hz
2
C serial interface. This open-drain
Block Diagram
N
N
Operation
32KHZ
INT/SQW
Maxim Integrated