5
External EEPROMs
You can easily solder a specific EEPROM density I²C or SPI to be used with the
X-NUCLEO-EEPRMA1
expansion board. The software can handle any density between 2 Kbit and 1 Mbit.
To use the external EEPROM, you have to apply some changes to the firmware and the hardware, as described
below.
Step 1.
Uncomment the macro M24XX (to use the I²C EEPROM) or M95XX (to use the SPI EEPROM) in the
“eeprom_expansion.h” file
Step 2.
Comment the macro I²C (to use the external I²C EEPROM) or the macro SPI (to use the external SPI
EEPROM).
Step 3.
Open J5 and J6 3V3 and VCC pins and short the EXT and VCC pins
Note:
External VCC can be used to power EEPROM with a different VCC for specific evaluations.
Figure 6.
I2C and SPI EEPROM soldered on the X-NUCLEO-EEPRMA1 expansion board
UM2480
External EEPROMs
UM2480
-
Rev 1
page 12/22