WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 136

• Manufacturer Part Number: WG82574L S LBA8
• Manufacturer: Intel

Specifications of WG82574L S LBA8

• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

Figure 28.
Note:
136
Packet and Absolute Timers
The ACK frame detect feature is only active when configured to packet split
(RCTL.DTYP=01b) or the extended status feature is enabled (RFCTL.EXSTEN is set).
• Small Receive Packet Detect (ICR.SRPD)
• Receive ACK frame interrupt is asserted when a frame is detected to be an ACK
frame. Detection of ACK frames are masked through the IMS register. When a
frame is detected as an ACK frame an interrupt is asserted after the
RAID.ACK_DELAY timer had expired and the ACK frames interrupts were not
masked in the IMS register.
PKT #1
PKT #1
— A receive interrupt is asserted when small-packet detection is enabled (RSRPD
C ase B: U sing an absolute tim e in conjunction w ith the P acket tim er
C ase C : P acket tim er expiring w hile a packet is transferred to host m em ory.
C ase A: U sing only an absolute tim er
is set with a non-zero value) and a packet of (size < RSRPD.SIZE) has been
transferred into the host memory. When comparing the size the headers and
CRC are included (if CRC stripping is not enabled). CRC and VLAN headers are
not included if they have been stripped. A receive timer interrupt cause
(ICR.RXT0) will also be noted when the small packet-detect interrupt occurs.
PKT #2
PKT #2
Illustrates that packet tim er is re-started only after a packet is transferred to host m em ory.
1) Packet tim er expires
2) Interrupt generated
3) Absolute tim er reset
1) Packet tim er expires
2) Interrupt generated
3) Absolute tim er reset
A bsolute Tim er Value
A bsolute Tim er Value
PKT #1
PKT #3
PKT #3
PKT #2
PKT #3
A bsolute Tim er Value
PKT #4
PKT #4
PKT #5
PKT #5
PKT #4
82574 GbE Controller—Inline Functions
PKT #6
PKT #6
A bsolute Tim er Value
A bsolute Tim er Value
Interrupt generalted (due to PKT #4)
as absolute tim er expires.
Packet delay tim er disabled untill
next packet is received and
transferred to host m em ory.
Interrupt generalted (due to PKT #4)
as absolute tim er expires.
Packet delay tim er disabled untill
next packet is received and
transferred to host m em ory.
...
...
Interrupt generated due to PKT #1
...
...
...
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