WG82574L S LBA9 Intel, WG82574L S LBA9 Datasheet - Page 191

• Manufacturer Part Number: WG82574L S LBA9
• Description: CONTROLLER, ENET, INTEL 82574L, 64PQFN
• Manufacturer: Intel

Specifications of WG82574L S LBA9

• Ethernet Type: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: 0°C To +85°C
• Digital Ic Case Style: QFN
• No. Of Pins: 64
• Package / Case: QFN
• Interface Type: I2C, JTAG, PCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Inline Functions—82574 GbE Controller
Figure 42.
Sync Flow and Offset Calculation
The hardware responsibilities are:
The software is responsible on:
1. Identify the packets that require time stamping.
2. Timestamp the packets on both Rx and Tx paths.
3. Store the time stamp value for software.
4. Keep the system time in hardware and give a time adjustment service to the
1. BMC protocol execution which means defining the node state (master or slave) and
2. Generate PTP packets, consume PTP packets.
3. Calculate the time offset and adjust the system time using hardware mechanism
Timestamp
Timestamp
Master
software.
selection of the master clock if in slave state.
for that.
T4
T1
T3
T2
Toffset = [(T2-T1)-(T3-T4)]/2
Timestamp
Timestamp
Slave
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