Grove - RTC User Manual
Release date：
Version：
2015/9/23
1.0
Wiki:
http://www.seeedstudio.com/wiki/index.php?title=Twig_-_RTC
Bazaar:
http://www.seeedstudio.com/depot/Grove-RTC-p-758.html
1
Document Revision History
Revision
1.0
Date
Sep 23, 2015
Author
Jiankai.li
Description
Create file
2
Contents
Document Revision History ·····································2
····································
1. Introduction ············································2
···········································
2. Specification ··········································· 3
···········································
3. Demonstration ·········································· 4
··········································
With Arduino ············································ 4
············································
With Raspberry Pi ········································· 6
·········································
4. Resources ·············································
············································ 11
3
Disclaimer
For physical injuries and possessions loss caused by those reasons which are not related to
product quality, such as operating without following manual guide, natural disasters or force
majeure, we take no responsibility for that.
Under the supervision of Seeed Technology Inc., this manual has been compiled and published
which covered the latest product description and specification. The content of this manual is
subject to change without notice.
Copyright
The design of this product (including software) and its accessories is under tutelage of laws. Any
action to violate relevant right of our product will be penalized through law. Please consciously
observe relevant local laws in the use of this product.
1
1. Introduction
The RTC module is based on the clock chip DS1307, which supports the I2C protocol. It utilizes a
Lithium cell battery (CR1225). The clock/calendar provides seconds, minutes, hours, day, date,
month, and year. The end of the month date is automatically adjusted for months with fewer than
31 days, including corrections for leap years. The clock operates in either the 24-hour or 12-hour
format with AM/PM indicator. And it is valid up to 2100. In order to gain a robust performance, you
must put a 3-Volt CR1225 lithium cell in the battery-holder. If you use the primary power only, the
module may not work normally, because the crystal may not oscillate.
Previous Version:
V0.9b
Note:
The battery is not included.
2
