SPRUJE4A August 2024 – November 2024 F29H850TU , F29H859TU-Q1
Parallel I/O Boot Can Cause Watchdog Timer Timeout if No Host Is Connected to EVM
Revisions Affected: All
Use of parallel I/O boot can lead to a watchdog timer timeout if a host does not drive the host control lines. The timeout will cause the F29H85x device to reset.
The boot mode switch (S1) on the EVM should not be set to parallel I/O boot unless a host is present to drive the host control lines.
Refer to the F29H85x and F29P58x Real-Time Microcontrollers Technical Reference Manual for more information on parallel boot.
Device GPIOs Dedicated to PMIC SPI Bus Should Be Used for SPI Function If Used On Baseboard
Revisions Affected: All
The F29H85x device and the PMIC on the controlSOM are connected via SPI bus. The SPI bus is used by the device to configure the PMIC and also, when enabled, to service the PMIC's watchdog. The SPI bus GPIOs are also connected to the SPI standard location on J1, see Table 5-1 for more information. Note that the SPI_STE pin is not connected to any of the baseboard headers.
Care must be taken when using these GPIOs on a baseboard since these GPIOs will toggle when the F29H85x device communicates with the PMIC via SPI. It is recommended to always use these pins for SPI function on a baseboard.
SPI Pin |
GPIO |
J1 Connection |
---|---|---|
PICO |
GPIO91 |
J1.75 |
POCI |
GPIO92 |
J1.77 |
CLK |
GPIO93 |
J1.79 |
PTE |
GPIO94 |
Not connected to J1 |
Limited Functionality On Early EVM Revisions
Revisions Affected: MCU144E1-001
Initial builds of the F29H85X-SOM-EVM are assembled with early samples of the F29H85x microcontroller (MCU). These MCU samples have the following limitations: