5.3.10 QSPI Flash
The SAM E54 Xplained Pro features one external MICRON, N25Q256A, 256Mbit QSPI NOR Flash Memory. QSPI Flash access can be configured in the QSPI module in the SAM E54, with support for XIP to run firmware directly from external flash. The table below lists all I/O-lines connected to the QSPI Flash.
Info: The PCB
tracks between the QSPI flash and the ATSAME54P20A
are routed with 60Ω impedance. The I/O drivers in the ATSAME54P20A should be set in high drive mode. The QSPI flash I/O drive
level can be configured to match 60Ω tracks in configuration registers in the QSPI
flash, refer to the QSPI datasheet for more information.
| SAM E54 pin | Function | QSPI Flash function | Shared functionality |
|---|---|---|---|
| PA08 | QIO0 | Slave In/IO0 | - |
| PA09 | QIO1 | Slave Out/IO1 | - |
| PA10 | QIO2 | Write Protect/IO2 | - |
| PA11 | QIO3 | Hold/IO3 | - |
| PB10 | QSCK | Clock | - |
| PB11 | QCS | Chip Select | - |