DS3231 RTC Module: Difference between revisions
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(Created page with "The DS3231 RTC is a low cost, battery backup, Real Time Clock, that connects to an I2C bus, providing accurate time information. Many DS3231 modules, like this one, https://www.ebay.com/itm/314250880191, have two I2C devices on-board, a DS3231 RTC and a AT24C32 EEPROM, allowing the storage of information into non-volatile memory.") |
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The DS3231 RTC is a low cost, battery backup, Real Time Clock, that connects to an I2C bus, providing accurate time information. | The DS3231 RTC is a low cost, battery backup, Real Time Clock, that connects to an I2C bus, providing accurate time information. | ||
[[File:DS3231.jpg|right|thumb]] | |||
Many DS3231 modules, like this one, https://www.ebay.com/itm/314250880191, have two I2C devices on-board, | Many DS3231 modules, like this one, https://www.ebay.com/itm/314250880191, have two I2C devices on-board, | ||
a DS3231 RTC and a AT24C32 EEPROM, allowing the storage of information into non-volatile memory. | a DS3231 RTC and a AT24C32 EEPROM, allowing the storage of information into non-volatile memory. | ||
'''Documents:''' | |||
DS3231: https://www.analog.com/media/en/technical-documentation/data-sheets/ds3231.pdf | |||
The time (and temperature), are accessed via 19 byte-wide registers, see Address Map on page 11. | |||
AT24C32: https://ww1.microchip.com/downloads/en/devicedoc/doc0336.pdf | |||
This 32Kbit (4096 x 8), will hold 4096 bytes of data. | |||
NOTE! These modules typically have a battery charger circuit to recharge a lithium coin cell. | |||
This can cause a problem is using non-rechargable coin cells. | |||
Revision as of 14:51, 1 August 2024
The DS3231 RTC is a low cost, battery backup, Real Time Clock, that connects to an I2C bus, providing accurate time information.
Many DS3231 modules, like this one, https://www.ebay.com/itm/314250880191, have two I2C devices on-board, a DS3231 RTC and a AT24C32 EEPROM, allowing the storage of information into non-volatile memory. Documents: DS3231: https://www.analog.com/media/en/technical-documentation/data-sheets/ds3231.pdf The time (and temperature), are accessed via 19 byte-wide registers, see Address Map on page 11. AT24C32: https://ww1.microchip.com/downloads/en/devicedoc/doc0336.pdf This 32Kbit (4096 x 8), will hold 4096 bytes of data. NOTE! These modules typically have a battery charger circuit to recharge a lithium coin cell. This can cause a problem is using non-rechargable coin cells.