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
PIOMnemonicShared PIOSignal Description
PB5QSPI1_SCKQSPI on SOMClock
PB6QSPI1_CSQSPI on SOMChip select
PB7QSPI0_IO0QSPI on SOMData0
PB8QSPI0_IO1QSPI on SOMData1
PB9QSPI0_IO2QSPI on SOMData2
PB10QSPI0_IO3QSPI on SOMData3