SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
Table 11-113 shows the network time synchronization functions supported by the device.
Interface | Time Sync Functions | Supported by |
---|---|---|
1×PCIE | Precision time measurement (PTM) | PCIe controller hardware |
2×CPSW | IEEE 1588-2008 (2-step), 802.1AS | CPTS in CPSW |
External input reference clock | External time/clock reference | CPTS |
These time sync functions are described in detail in their respective chapters.
Any of these functions can be a time sync master in the system. A sync router (TIMESYNC_INTRTR0) provides flexibility for each time domain to choose its synch master independently. In addition, there is also a router (CMPEVT_INTRTR0) that provides selection of active counter compare events for routing as CPU or DMA events.
Figure 11-56 shows a high-level overview of the SoC time sync architecture.