JAJSLL2B April 2021 – November 2021 DP83561-SP
PRODUCTION DATA
The DP83561-SP supports an IEEE 1588 indication pulse at the SFD (start frame delimiter) for the receive and transmit paths. The pulse can be delivered to various pins. The pulse indicates the actual time the symbol is presented on the MAC I/O lines (for transmit), or the first symbol received (for receive). This signal toggles after some latency from the MDI lines. The exact timing of the pulse can be adjusted through register. Each increment of phase value is an 8-ns step.
The SFD pulse output can be configured using the GPIO Mux Control register GPIO_MUX_CTRL (register address 0x1E0). The ENHANCED_MAC_SUPPORT bit in RXCFG (register address 0x134) must also be set to allow output of the SFD.