SNLS779A July 2025 – November 2025 DP83TC815-Q1
PRODUCTION DATA
The DP83TC815-Q1 is capable of being programmed to generate a trigger signal on a GPIO configured as output pin based on the IEEE802.1AS time value. Each trigger can be programmed to generate a one-time rising or falling edge, a single pulse of programmable width. DP83TC815-Q1 can also be used to generate a Periodic Output signal.
For each trigger, the host (MAC) specifies the desired GPIO and trigger occurrence time. The trigger is generated when the internal PTP clock matches the programmed trigger activation time.
The device supports up to 8 trigger signals which can be output on any of the GPIO signal pins. Multiple triggers can be assigned to a single GPIO, allowing generation of more complex waveforms (that is, a sequence of varying width pulses). The trigger signals are OR’ed together to form a combined signal. The triggers are configured through the PTP Trigger Configuration Registers and enabled through the PTP Control register. The trigger time and width settings are controlled through the PTP Control and Time Data registers. Each trigger can be programmed to generate status on completion or on an error.
The DP83TC815-Q1 can be programmed to output a Pulse-Per-Second (PPS) signal using the trigger functions.