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# 1.2.5.7 Memory Driver Configuration

Since the Demo Meter application needs to read/write data information from/to an external memory, the Memory Driver is used to access an available external memory in the Development Boards through QSPI.

Figure 1-58.External Memory Access Through QSPI

The Datalog application defines and manages different regions depending on the data information to be stored in the external memory:

- Metrology region
- User calibration region
- TOU (Time of Use) region
- RTC region
- Console region
- Events region
- Energy region
- Demand region

The following image shows the configuration of the Memory Driver module:

Figure 1-59.Memory Driver Module Configuration

The Memory Driver is configured in Asynchronous mode to avoid blocking program execution during write operations.

Rev: E