PTP Timestamp Unit

PPF proved

NetTimeLogic’s PTP Timestamp Unit is an implementation of a single port Frame Timestamp Unit (TSU) according to IEEE1588-2008 (PTP). It detects PTP frames on a (R)(G)MII tap and timestamps PTP event frames based on a Counter Clock and provides them delay compensated to a PTP Software stack (e.g. PTPd, PTP4l, etc…). The Timestamp Unit can work as PTP Ordinary Clock (OC) as Master and Slave; it can also be used to build a PTP Boundary Clock (BC) by having multiple instances of the IP core connected to multiple Ethernet ports. All configuration can be written, and timestamps read via an AXI4Light-Slave Register interface.

The IP core comes with a Linux Driver for the Xilinx(R) Zynq 70xx (and as template for integration into other SoCs with AXI interface)

Block Diagram

PTP Timestamp Unit


Synchronization Accuracy

TSU Accuracy

100ns per division on oscilloscope

The synchronization accuracy achieved with a 50MHz oscillator is around +/-25ns


  • PTP Timestamp Unit according to IEEE1588-2008
  • PTP frame detection
  • PTP event frame timestamping
  • Taps path between MAC and PHY or intercepts path between MAC and PHY
  • Optional One Step support (requires intercepting the path between MAC and PHY)
  • Synchronization accuracy: +/- 25ns
  • Support for Layer 2 (Ethernet) and Layer 3 (Ip), VLAN, HSR and PRP, Peer to Peer (P2P) and End to End (E2E).
  • Master and Slave support
  • Full line speed
  • AXI4 Light register set
  • Configurable Interrupt
  • PHY Delay compensation with automatic link speed detection
  • MII/RMII/GMII/RGMIII Interface support (optional AXI4 stream for interconnection to 3rd party cores)
  • Optional 10G XGMII extension (requires add-on license)
  • Linux Driver (MACB & TSU Zynq 70xx), TSU driver part is independent from MAC driver (needs to be called though from the MAC driver)
  • Timestamp resolution with 50 MHz system clock: 10ns, with high resolution clock 4ns

Licensing & Pricing

There are different licensing possibilities (more info here). All prices are in US Dollars without VAT, all prices are one-time fees, no royalties apply:

  • Project Source Code: 3900$
  • Site Source Code: 7100$

All prices are non-binding estimates – please use the contact form for definitive pricing and lead-time information.


Evaluation binaries available for Digilent's Arty Z7 development boards (with ptp4l as software stack) or as Modelsim(R) precompiled libraries => contact us for free access

Ptp_Tsu_Flyer.pdf Ptp_Tsu_Flyer.pdf
Size : 117.11 Kb
Type : pdf
Ptp_Tsu_ReferenceManual.pdf Ptp_Tsu_ReferenceManual.pdf
Size : 1591.38 Kb
Type : pdf