If an Ethernet PHY is connected to the GEMAC0 pins of the MPU, unless the PHY
supports adjustable drive strength, it is recommended that series resistors (33 Ω
for ex) are placed on the RX lines of the interface, close to the PHY.
If CMOS-compatible output oscillators
are used as clock sources for the MPU, Ethernet PHYs or other devices, their active
low standby pin (if present) can be driven low by an N-channel MOSFET controlled by
the LPM pin of the MPU. This feature helps reduce power consumption during certain
low-power modes, when those clock sources are not used.
If the application requires current measurement of certain power rails, those rails
can be split by shunt resistors.
The NRST_OUT pin of the MPU can be used as a reset source for other devices used in
the design (QSPI memories, Ethernet PHYs, etc.)
Each SDMMC interface has its own
dedicated reset pin (SDMMCx_RSTN). It can be used to reset SDIO devices or to
perform power cycles on SD Cards.
It is recommended to use ports PD16 (FLEXCOM3_IO0 - TX) and PD17 (FLEXCOM3_IO1 - RX)
as a serial debug console, since those ports are configured by default for this
function at power-up.
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
