DS3231 AT24C32 IIC
Precision RTC Real Time Clock Memory Module For Arduino new
original
DS3231 is a low-cost, extremely accurate I2C
real-time clock (RTC), with an integrated temperature-compensated
crystal oscillator (TCXO) and crystal. The device incorporates a
battery input, disconnect the main power supply and maintains
accurate timekeeping. Integrated oscillator improve long-term
accuracy of the device and reduces the number of components of the
production line. The DS3231 is available in commercial and
industrial temperature ranges, using a 16-pin 300mil SO
package.
RTC maintains seconds, minutes,
hours, day, date, month, and year information. Less than 31 days of
the month, the end date will be automatically adjusted, including
corrections for leap year. The clock operates in either the 24
hours or band / AM / PM indication of the 12-hour format. Provides
two configurable alarm clock and a calendar can be set to a square
wave output. Address and data are transferred serially through an
I2C bidirectional bus.
A precision
temperature-compensated voltage reference and comparator circuit
monitors the status of VCC to detect power failures, provide a
reset output, and if necessary, automatically switch to the backup
power supply. In addition, / RST pin is monitored as generating μP
reset manually.
Save time and high precision addition, DS3231
also has some other features that extend the system host of
additional features and a range of options. The device integrates a
very precise digital temperature sensor, through the I2C *
interface to access it (as the same time). This temperature sensor
accuracy is ± 3 ° C. On-chip power supply control circuit can
automatically detect and manage the main and standby power (i.e.,
low-voltage battery) to switch 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 allowable
range, the on-chip reset function can be used to restart the system
microprocessor.
Module parameters:
1 Size: 38mm (length) * 22mm (W) * 14mm
(height)
2 Weight: 8g
3 Operating voltage :3.3 - 5 .5
V
4 clock chip: high-precision clock chip
DS3231
5 Clock Accuracy :0-40 ° range, the accuracy
2ppm, the error was about 1 minute
6 calendar alarm clock with
two
7 programmable square-wave
output
8 Real time clock generator seconds, minutes,
hours, day, date, month and year timing and provide valid until the
year 2100 leap year compensation
9 chip temperature sensor comes with an
accuracy of ± 3 °
10 memory chips: AT24C32 (storage capacity
32K)
11.IIC bus interface, the maximum transmission
speed of 400KHz (working voltage of 5V)
12 can be cascaded with other IIC device,
24C32 addresses can be shorted A0/A1/A2 modify default address is
0x57
13 with rechargeable battery LIR2032, to
ensure the system after power failure, the clock move any natural
normal
14 Packing: single anti-static
packaging
Wiring instructions (for Arduino uno r3 for
example):
SCL → A5
SDA → A4
VCC → 5V
GND → GND