SPRUI97E May 2017 – September 2025 AM5716 , AM5718
Software must program the CDCE913 for 0pf load capacitance to allow crystals to operate at their target frequency. Crystal load capacitors can be added to the oscillator circuit to allow the generated clock to output at the required nominal frequency so that this programming is not required. The default capacitance within the CDCE913 is 10pF so the capacitors C172, C173, C193, and C194 should be 8pF. For more information, see the CDCE(L)913: Flexible Low Power LVCMOS Clock Generator With SSC Support for EMI Reduction Data Manual. Also note that these clock generators are used to drive Ethernet circuitry, so the same crystal accuracy requirement from Section 3.1.11 applies to these crystals as well.