795 B
795 B
SPI master half duplex EEPROM example
This code demonstrates how to use the SPI master half duplex mode to read/write a AT93C46D
EEPROM (8-bit mode). There is also an Kconfig option EXAMPLE_USE_SPI1_PINS allowing use the
SPI1 (bus with code Flash connected on official modules).
Connections
For different chip and host used, the connections may be different.
| ESP32 | ESP32 | ESP32S2 | |
|---|---|---|---|
| Host | SPI1 | HSPI | FSPI |
| VCC | 3.3V | 3.3V | 3.3V |
| GND | GND | GND | GND |
| DO | 7 | 18 | 37 |
| DI | 8 | 23 | 35 |
| SK | 6 | 19 | 36 |
| CS | 13 | 13 | 34 |
| ORG | GND | GND | GND |
Notes
If you meet timeout issues, please check your connections.