WG82574L S LBA9 Intel, WG82574L S LBA9 Datasheet - Page 184

• 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

Figure 41.
184
Interrupt Throttle Flow Diagram
For cases where the 82574 is connected to a small number of clients, it is desirable to
fire off the interrupt as soon as possible with minimum latency. For these cases, when
the EITR counter counts down to zero and no interrupt event has happened, then the
EITR counter is not reset but stays at zero. Thus, the next interrupt event triggers an
interrupt immediately. That scenario is illustrated as Case B as follows.
Yes
No
No
No
Counter = 0
Assert Interrupt
Clear Interrupt
Load counter
Start count
with interval
Yes
Yes
Interrupt
active
Intr ack
down
?
?
?
v
v
Yes
82574 GbE Controller—Inline Functions