An updated version of the Pin ALTernative functions (IOMUX) for the MaaxBoard-RT
(not all, just which alternatives which are interesting for me).
Comments:
There are enough FLEXIO2_Dxx pins available in order to implement SPI, I2C, UART, ... in addition to the
normal peripherals (e.g. LPSPI4, LPSPI2, ... plus a SPI via FlexIO ...)
Unfortunately not a complete FLEXSPI2_A available: I cannot use to implement a QSPI master device (via FlexSPI,
maybe with FLEXIO I can).
See all the pins marked with "Fast GPIO", GPIO_MUX2_IOxx and GPIO_MUX3_IOxx:
these can be used for "Fast GPIO" (tightly coupled GPIO): CM7 or CM4 can access and toggle GPIO much faster
as a regular GPIO (6..15 MHz vs. 100..250 MHz as Fast GPIO - a separate thread in forum will come).
Figure: MaaxBoard-RT pin mux table (potential alternatives)