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1.3 KiB
1.3 KiB
| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-S2 | ESP32-S3 |
|---|
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 | ESP32C2 | ESP32C3 | ESP32C6 | ESP32S3 | |
|---|---|---|---|---|---|---|---|
| Host | SPI1 | HSPI | SPI2 | SPI2 | SPI2 | SPI2 | SPI2 |
| VCC | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| GND | GND | GND | GND | GND | GND | GND | GND |
| DO | 7 | 18 | 37 | 2 | 2 | 2 | 13 |
| DI | 8 | 23 | 35 | 7 | 7 | 7 | 11 |
| SK | 6 | 19 | 36 | 6 | 6 | 6 | 12 |
| CS | 13 | 13 | 34 | 10 | 10 | 10 | 10 |
| ORG | GND | GND | GND | GND | GND | GND | GND |
Notes
If you meet timeout issues, please check your connections.