3.2.5 Additional Memories

One additional memory, QSPI device U9, can be soldered on the baseboard. This QSPI Flash memory uses the same PIOs as the SOM QSPI. Such configuration makes it possible to choose between two bootable memories.

The figure below illustrates the QSPI memory implementation.
Figure 3-12. Optional QSPI Serial Data Flash on Baseboard
Table 3-4. QSPI Signal Descriptions
PIO Mnemonic Shared PIO Signal Description
PB5 QSPI1_SCK QSPI on SOM Clock
PB6 QSPI1_CS QSPI on SOM Chip select
PB7 QSPI0_IO0 QSPI on SOM Data0
PB8 QSPI0_IO1 QSPI on SOM Data1
PB9 QSPI0_IO2 QSPI on SOM Data2
PB10 QSPI0_IO3 QSPI on SOM Data3