SPECIFICATIONS

Precision clock module

DS3231Low-cost, high-precisionI2CReal-Time Clock(RTC)TCXO with integrated(TCXO)And crystals. The device incorporates a battery input , and maintains accurate timekeeping when main power supply is disconnected . Integrated Crystal improved long-term accuracy of the device and reduces the number of components of the production line .DS3231Offered in commercial and industrial temperature ranges,16Pin300milofSOPackage.
   RTCSave seconds, minutes , hours, day , date , month, and year information. less than31The days of the month , end of the month date is automatically adjusted , including corrections for leap year. Clock work format can be24Hour or belt/ AM / PMInstructions12Hour format. It provides two calendar alarm clock can be set and a square wave output can be set . Address and dataI2CBidirectional serial transmission bus .
   A precision temperature-compensated voltage reference and comparator circuit monitorsVCCState , detect power failures , provide a reset output , and to automatically switch to the backup supply when necessary . In addition ,/ RSTMonitoring pins can be used as produceμPManual reset input.
In addition to high- precision timekeeping outside ,DS3231Also has some other function,These features extend the system host additional features and options. The device integrates an extremely accurate digital temperature sensor , throughI2C *Interface can be accessed(As the same time). Accuracy of the temperature sensor is± 3 ° C. The control circuit can be realized on-chip automatic power to detect and manage the main power supply and backup power(That low-voltage battery)Switching between the power supply . If the main power failure , the device can continue to provide accurate timing and temperature , performance is not affected . When the main power re-power or voltage value returns to within the permissible range , the on-chip reset function can be used to restart the system microprocessor.

Module parameters:
1.size: 38mm (long) * 22mm (wide) * 14mm (High)
2.weight:8g
3 .Operating Voltage: 3.3--5.5V
4 .Clock Chip:Precision clock chipDS3231
5 .Clock Accuracy: 0-40 °Within range,Accuracy2ppm,In error about1minute
6 .Belt2Calendar alarm clock
7 .A programmable square-wave output
8.Real-time clock generating seconds, minutes , hours, day , date , month and year time, and provide valid until2100Compensation leap year
9.Internal temperature sensor chip comes,Accuracy± 3 °
10 .Memory chip: AT24C32 (Storage capacity32K)
11.IICBus Interface,The maximum transmission speed400KHz (Operating voltage5VTime)
12 .Cascadable OtherIICequipment, 24C32Address by short circuitA0 / A1 / A2modify,The default address is0x57
13 .With rechargeable batteryLIR2032,Ensure the system after power failure,Any natural clock normal walking
14 .Packing:Single anti-static packaging
Wiring instructions(Withuno r3Case) :
SCL → A5
SDA → A4
VCC → 5V
GND → GND

Pack:
DS1307 I2C real-time clock chip (RTC)
24C32 32K I2C EEPROM memory
Solve the problem DS1307 with backup battery can not read and write.
Fully charged, it can provide the DS1307 timing 1.
Compact design, 27mm * 28mm * 8.4mm
Leads to the a DS1307 clock pin, to provide the clock signal for the microcontroller.
Can be cascaded to other I2C devices.

DESCRIPTION
The DS1302 is a trickle charge clock chip from DALLAS that contains areal-time clock / calendar and 31 bytes of static RAM to communicate withthe microcontroller through a simple serial interface.Real-time clock/calendatcircuit provides seconds, minutes, hours, days, weeks, months,years of
information, the number of days per month and leap year number of dayscan be adjusted automatically.The clock operation can be determined bythe AM / PM indication in a 24 or 12 hour format.(1) RST reset (2)1 / O datalines (3) SCLK serial clock.(1) RST reset(2)l / O data lines (3)SCLK serialclock.Clock / RAM read / write data in a byte or up to 31 bytes of charactergroup communication. DS1302 power consumption is very low to maintaindata and clock information when the power is less than 1mw
FEATURES
Wide operating voltage 2.0v
Working current 2.0V, less than 300nA
Read / write clock or RAM data, there are two transfer methods Single bytetransfer and multi-byte transmission character group mode
 3-wire interface compatible with TTL Vcc = 5V
Optional industrial temperature range -40 +85
PCB for the single-panel, size: 44mm * 23mm * 1.6mmo With 4 positioning holes, diameter 3.1mm
With 4 positioning holes, diameter 3.1mm
Backup battery for the authentic celestial sphere CR2032,voltage 3V,current 260mAh, non-rechargeable battery.Theoretical data retention timegreater than 10 years!
Crystal 32.768KHz,Japan imported crystal, matching capacitance of 6pF,size 2 * 6mm
DS1302 8-pin plug-in large chip made, the chip below IC Block, easy toreplace and plug the chip
Module operating voltage is compatible with 3.3V / 5V,and 5V and 3.3vsingle-chip connection
Operating temperature: 0 °--- 70 °

This module is designed for Raspberry PI RTC module. The module adopts I2C communication mode, Raspberry PI. The onboard DS1307 clock chip and button battery ensure that the 1220 Raspberry PI can still remember the time. Reserved serial port, TTL convenient online debugging. Small size, large power

1. Motherboard Maxim DS1307 chip;

CR1220 button battery, power supply;

You can directly use shell scripts to operate;

Responsible for serial port debugging of Raspberry PI;

Programmable square wave output.

2. Product interface:

Raspberry PI B 2X13 socket;

Raspberry PI A + / B + / 2 generation 2X20 socket;

Support Raspberry PI B/A + / B + / 2;

2 * 5p 2.54mm pitch interface.

3: Parameters:

Operating voltage is 5V;

Temperature range from 0°C to + 40°C clock accuracy ±2ppm;

The real-time clock provides information on seconds, minutes, hours, days, days, months, and years, and provides leap year compensation valid until 2100;

Two calendar alarm clock;

Operating temperature :-10℃~ + 85℃.

4: Typical applications:

Remote information processing system

Overview:

1. DS3231 high precision clock module for Raspberry Pi
2. the module can also be used for Arduino motherboard
3. The module itself can be adapted to 3.3 V and 5 V system,
no level conversion, it is super convenient!

Features:

1. to 40° to + 85° temperature range, timing accuracy in
    a plus or minus 5 PPM (+/- 0.432 SEC/day)
2. To provide continuous timing battery backup
3. Low power consumption
4. The device compatible with DS3231 encapsulation and function
5. Complete the clock calendar function including the second, minute,
6. Two calendar clock
7. 1 Hz and 32.768 kHz output
8. Reset the output and input button to tremble
9. High speed (400 KHZ) the I2C serial bus
10.+ 2.3 V to + 5.5 V power supply voltage
11.The accuracy of plus or minus 3° digital temperature sensor
12.- 40 ° to + 85° temperature range

1, PCF8563 clock chip
PCF8563 is a PHILIPS company launched an industrial I2C bus interface with a very low power consumption of multi-functional clock / calendar chip. PCF8563 a variety of alarm function, timer function, clock output function and interrupt output function to complete a variety of complex timing services, and even for the microcontroller to provide watchdog function. It is a cost-effective clock chip, which has been widely used in the field of electric meters, water meters, gas meters, telephones, fax machines, portable instruments and battery powered instruments and meters.
Main performance index of PCF8563:
You can use the standby battery
Wide voltage range of 1.0~5.5V.
This ultra low power consumption: the typical value is 0.25uA
It through the I2C bus serial input / output
This programmable clock output frequency: 32.768KHz, 1024Hz, 32Hz, 1Hz.
* four alarm and timer function
It includes a reset circuit, oscillator capacitor and power failure detection circuit
Open drain interrupt output.
400KHZ read and write speed
2, module interface description
Left battery mounting interface
Pay attention to the installation direction, according to the direction of the image installation
Right INT interrupt output (generally not used)
COT clock output (generally not used)
SCL IIC clock interface MCU IO port
SDA IIC digital interface MCU IO port
The GND module of extraterrestrial grounding
VCC power supply interface 3.3v-5v