Datasheet

IEEE 1588 Code

MAC

Microcontroller

or Microprocessor

Application Code

PHY

IEEE 1588

Packet Detection

and Processing

IEEE 1588 Control

IEEE 1588 Clock

Real TIme Actions

LAN

MDIO

GPIO

Clock

MII

DP83640

www.ti.com

SNOSAY8E –SEPTEMBER 2007–REVISED APRIL 2013

2.3 Key IEEE 1588 Features

IEEE 1588 provides a time synchronization protocol, often referred to as the Precision Time Protocol

(PTP), which synchronizes time across an Ethernet network. DP83640 supports IEEE 1588 Real Time

Ethernet applications by providing hardware support for three time critical elements.

• IEEE 1588 synchronized clock generation

• Packet timestamps for clock synchronization

• Event triggering and timestamping through GPIO

By combining the above capabilities, the DP83640 provides advanced and flexible support for IEEE 1588

for use in a highly accurate IEEE 1588 system.

The DP83640 provides features for controlling the clock operation in Slave mode. The clock value can be

updated to match the Master clock in several ways. In addition, the clock can be programmed to adjust its

frequency to compensate for drift.

The DP83640 supports real time triggering activities and captures real time events to report to the

microcontroller. Controlled devices can be connected to the DP83640 through the available GPIO.

The IEEE 1588 features are briefly presented below. For a more detailed discussion on configuring

the IEEE 1588 features, refer to the Software Development Guide for the DP83640.

Figure 2-3. DP83640 Example System Application

Submit Documentation Feedback

Product Folder Links: DP83640