Issue in reading the EEPROM data via SPI
Hi,
We are using MPC5xxx uC and configured single SPI channel for 3 different devices.
One of the device is EEPROM (M95256-DRE) and SPI channel is configured as 'Synchronous' mode.
Issue :
Before configuring the SPI channel for EEPROM, the two devices were able to successfully get the transmit / receive the data via SPI channel.
We tried testing the EEPROM independently and we were able to read / write the data from / to EEPROM successfully (Here the other two devices functionality was disabled).
When all the 3 devices functionality is enabled, we observed the below issue :
Scneario 1 : When EEPROM alone is requested to transmit the data we are able to receive the data from EEPROM.
Scneario 2 : Sequentially we are utilizing the SPI channel to get the data from EEPROM and other devices in below mentioned sequence.
Step 1 : Send command to get the data from EEPROM. Here we are getting correct data.
Step 2 : Send command to get the data from other devices. Here we are getting correct data.
Step 3 : Send command to get the data from EEPROM . Here we are getting zero value from EEPROM but the request is transmitted successfully.
From the above observation we have a query that whether EEPROM needs a dedicated SPI channel.
Could you please answer the above mentioned query and help us resolve the above mentioned issue at the earliest.
Thank you.