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DS3232MEVKIT# 其他数据使用手册 - Maxim Integrated（美信）
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Maxim Integrated（美信）
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开发套件
描述:
时钟和定时器开发工具 DS3232M Eval Kit
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DS3232MEVKIT#数据手册
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DS3232M
±5ppm, I
2
C Real-Time Clock with SRAM
General Description
The DS3232M is a low-cost, extremely accurate, I
2
C
real-time clock (RTC) with 236 bytes of battery-backed
SRAM. The device incorporates a battery input and
maintains accurate timekeeping when main power to the
device is interrupted. The integration of the microelec-
tromechanical systems (MEMS) resonator enhances the
long-term accuracy of the device and reduces the piece-
part count in a manufacturing line.
The RTC maintains 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 31 days, including corrections for leap year. The
clock operates in either the 24-hour or 12-hour format
with an AM/PM indicator. Two programmable time-of-day
alarms and a 1Hz output are provided. Address and data
are transferred serially through an I
2
C bidirectional bus.
A precision temperature-compensated voltage reference
and comparator circuit monitors the status of V
CC
to
detect power failures, to provide a reset output, and to
automatically switch to the backup supply when neces-
sary. Additionally, the RST pin is monitored as a pushbut-
ton input for generating a microprocessor reset. See the
Block Diagram for more details.
Applications
Power Meters
Industrial Applications
Features
S Timekeeping Accuracy ±5ppm (±0.432 Second/
Day) from -40NC to +85NC
S 236 Bytes of Battery-Backed User SRAM
S Battery Backup for Continuous Timekeeping
S Low Power Consumption
S Functionally Compatible to DS3232
S Complete Clock Calendar Functionality Including
Seconds, Minutes, Hours, Day, Date, Month, and
Year with Leap Year Compensation Up to Year
2100
S Two Time-of-Day Alarms
S 1Hz and 32.768kHz Outputs
S Reset Output and Pushbutton Input with
Debounce
S Fast (400kHz) I
2
C-Compatible Serial Bus
S +2.3V to +4.5V Supply Voltage
S Digital Temp Sensor with ±3NC Accuracy
S -40NC to +85NC Temperature Range
S 8-Pin SO (150 mils) Package
S Underwriters Laboratories (UL) Recognized
Typical Operating Circuit
19-6247; Rev 1; 8/12
Ordering Information appears at end of data sheet.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may
be simultaneously available through various sales channels. For information about device errata, go to: www.maximintegrated.com/errata.
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/DS3232M.related
DS3232M
SCL
SDA
32KHZ
V
BAT
V
CC
V
CC
CPU
I/O PORT
INTERRUPTS
INT/SQW
RST
PUSH-
BUTTON
RESET
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
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