WG82574L S LBA9 Intel, WG82574L S LBA9 Datasheet - Page 31

• 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

Interconnects—82574 GbE Controller
3.1.3.2
Table 17.
3.1.3.3
Flow control types:
Transaction Types Initiated by The 82574L
Transaction Types at the Tx Transaction Layer
1. The MAX_PAYLOAD_SIZE supported is loaded from the NVM (either 128 bytes or 256 bytes). Effective
Message Handling by The 82574L (as a Receiver)
Message packets are special packets that carry a message code.
The upstream device transmits special messages to the 82574 by using this
mechanism.
The transaction layer decodes the message code and responds to the message
accordingly.
Memory Write
Request
I/O Read Request
I/O Write Request
Read Completions
Message
Configuration Read Request
Completion
Configuration Write Request
Completion
I/O Read Request Completion
I/O Write Request Completion
Read Request Completion
Memory Read Request
Memory Write Request
Message
• PH - Posted request headers
• PD - Posted request data payload
• NPH - Non-posted request headers
• NPD - Non-posted request data payload
• CPLH - Completion headers
• CPLD - Completion data payload
Transaction Type
MAX_PAYLOAD_SIZE is according to configuration space register.
Transaction Type
PH +
PD
NPH
NPH +
NPD
CPLH +
CPLD
PH
FC Type
-
CPLH + CPLD
CPLH
-
-
Dword
-
Dword
-
Dword/Qword
-
<= MAX_PAYLOAD_SIZE
-
Reaction
Tx Later
Payload Size
Data From Original Packet
-
Requester ID, TAG, Attribute
Requester ID, TAG, Attribute
-
-
Hardware Should Keep
1
CPLH + CPLD
CPLH
CPLH + CPLD
CPLH
CPLH + CPLD
NPH
PH + PD
PH
FC Type
CSR
CSR
CSR
DMA
Message Unit / INT / PM
/ Error Unit
Configuration space
Configuration space
CSR
CSR
CSR
DMA
DMA
Message Unit / INT /
PM / Error Unit
For Client
From Client
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