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.
Table 1. QSPI Flash Connections
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 -
Parent topic: Introduction