SPRUJ10D May 2022 – September 2023
The AM263x SoC requires a 25MHz clock input for XTAL_XI. The AM263x LaunchPad uses a 25MHz crystal for the SoC clock source. The LaunchPad also has two 25MHz Crystals on-board for the Ethernet PHY clocking. The SoC clock signal output CLKOUT0 can be used as a clock source for Ethernet PHY #1 by removing the resistors mounted for XTAL_XI and XTAL_XO from the 25MHz Ethernet PHY #1 Crystal and mounting the appropriate resistor for the CLKOUT0 signal to be routed to the XI pin of the Ethernet PHY.
The Ethernet PHY #1 clock signal output ETH1_CLKOUT can be used as a clock source for Ethernet PHY #2 by removing the resistors mounted for XTAL_XI and XTAL_XO from the 25MHz Ethernet PHY #2 Crystal and mounting the appropriate resistor for the ETH1_CLKOUT signal to be routed to the XI pin of Ethernet PHY #2.
The LaunchPad also requires a 16 MHz clock source for the XDS110 for UART-USB JTAG support.