Intel EP80579

Intel
®
EP80579 Integrated Processor Product Line May 2010
Order Number: 320068-005US 230
IEEE 1588-2008 Hardware Assist Interface—Intel
®
EP80579 Integrated Processor Product Line
20.1 Input/Output Signal Application
The IEEE 1588-2008 hardware assist has a total of six input/output signals, as
described in the following tables.
This section describes how the signals shown in the tables above can be used for
debugging, event capture, and event trigger. The usage of the input/output signals can
vary from application-to-application and software implementation.
All of the above signals can be accessed on the Development Board via the IEEE 1588
Hardware Assist Interface Connector J53.
Figure 142. Classic Clock Synchronization Example
NETWORK
NO IEEE-1588
3:00 AM 3:03 AM 3:05 AM
NETWORK
IEEE-1588
ASSIST
3:00 AM 3:00 AM 3:00 AM
NODE 1
NODE 2
NODE 3 NODE 1 NODE 2 NODE 3
GRAND MASTER SLAVE SLAVE
Full Duplex
Inputs
ASMSSIG
• Auxiliary Slave Mode Snapshot
• Must be pulled down with a 10K ohm
resistor when the port is not connected to
an interfacing device.
AMMSSIG
• Auxiliary Master Mode Snapshot
• Must be pulled down with a 10K ohm
resistor when the port is not connected to
an interfacing device.
Outputs
1588_TESTMODE_DATA
• Test Mode Data
• Can be left NC when the port is not
connected to an interfacing device.
1588_PPS
•Test Pulse Per Second
• Can be left NC when the port is not
connected to an interfacing device.
1588_RX_SNAP
• Receive Snapshot Taken
• Can be left NC when the port is not
connected to an interfacing device.
1588_TX_SNAP
•Transmit Snapshot Taken
• Can be left NC when the port is not
connected to an interfacing device.