SPRUJ93 august 2023
The AM263x Control Card has a 128 Mbit QSPI memory device (S25FL128SAGNFI000), which is connected to the QSPI0 interface of the AM263x SoC. The QSPI supports single data rates with memory speeds up to 104 MHz. The QSPI flash is powered by the 3.3-V IO supply (VSYS_3V3A).
The QSPI0_D0/D1 signals are also used for BOOTMODE control logic. There are 10-kΩ resistors used to isolate the BOOTMODE control logic after the value is latched.