9.4 QSPI NOR Memory

The Microchip SAM9X75 System-On-Module Series embeds the SST26VF064BEUIT-104I/MF, a 64-Mbit Serial Quad I/O Flash memory.

The SST26VF064BEUI SQI features a 6-wire, 4-bit I/O interface that allows for low-power, high performance operation in a low pin-count package.

The SST26VF064BEUI also embeds EUI-48 and EUI-64 MAC addresses.

The SST26VF064BEUI is available in a 6x5 mm 8-lead WDFN package. For more information, refer to the SST26VF064BEUI data sheet (see Reference Documents).

Figure 9-2. QSPI Memory Block Diagram

Note: For debug purposes, the embedded QSPI Chip Enable pin can be uncoupled from the microprocessor. QSPI_CS_IN (pin 21) is accessible externally and can be uncoupled from QSPI_CS_PB20 (pin 20) so that the boot can be unselected from the QSPI Flash memory during debug phases.