Getting Started with I2C: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
==Agenda== | |||
What we are going to talk about: | |||
* I2C | |||
* DS3231 | |||
* AT24C32 | |||
* TM1637 | |||
* Logic8 / Logic16 | |||
1) What is I2C - The bus hardware | |||
2) START and STOP conditions (These are NOT bits) | |||
3) I2C Address and the R /W bit - (7 or 8 bit I2C address ?) | |||
4) Acknowledge bit (receiver of data provides acknowledge) | |||
5) What isn't I2C? Examine the TM1637 | |||
5) Checkout the DS3231, write and read it's registers | |||
6) Checkout the AT24C32, write and read data | |||
DS3231 Module | ==DS3231 Module== | ||
===DS3231=== | |||
The time (and temperature), are accessed via 19 byte-wide registers, see Address Map on page 11. | The time (and temperature), are accessed via 19 byte-wide registers, see Address Map on page 11. | ||
https://www.analog.com/media/en/technical-documentation/data-sheets/ds3231.pdf | |||
https://www.analog.com/media/en/technical-documentation/data-sheets/ds3231m.pdf (The 'M' variant) | |||
===AT24C32=== | |||
This 32Kbit EEPROM (4096 x 8), will hold 4096 bytes of data. | This 32Kbit EEPROM (4096 x 8), will hold 4096 bytes of data. | ||
https://ww1.microchip.com/downloads/en/DeviceDoc/doc0336.pdf | |||
Revision as of 09:13, 15 January 2025
Agenda
What we are going to talk about:
- I2C
- DS3231
- AT24C32
- TM1637
- Logic8 / Logic16
1) What is I2C - The bus hardware 2) START and STOP conditions (These are NOT bits) 3) I2C Address and the R /W bit - (7 or 8 bit I2C address ?) 4) Acknowledge bit (receiver of data provides acknowledge) 5) What isn't I2C? Examine the TM1637 5) Checkout the DS3231, write and read it's registers 6) Checkout the AT24C32, write and read data
DS3231 Module
DS3231
The time (and temperature), are accessed via 19 byte-wide registers, see Address Map on page 11. https://www.analog.com/media/en/technical-documentation/data-sheets/ds3231.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/ds3231m.pdf (The 'M' variant)
AT24C32
This 32Kbit EEPROM (4096 x 8), will hold 4096 bytes of data. https://ww1.microchip.com/downloads/en/DeviceDoc/doc0336.pdf
References: https://www.ti.com/lit/an/sbaa565/sbaa565.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/ds3231.pdf https://www.arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf