WG82577LM S LGWS Intel, WG82577LM S LGWS Datasheet - Page 139

• Manufacturer Part Number: WG82577LM S LGWS
• Manufacturer: Intel

Specifications of WG82577LM S LGWS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Intel
10.2.1.1.14 PCIE Analog Configuration - PCIEANACFG (0x00F18; RW)
10.2.1.1.15 Packet Buffer Allocation - PBA (0x01000; RW)
Note:
Note:
Note:
Note:
10.2.1.1.16 Packet Buffer Size - PBS (0x01008; RW)
®
5 Series Express Chipset MAC Programming Interface—82577 GbE PHY
This register sets the on-chip receive and transmit storage allocation ratio.
Programming this register does not automatically re-load or initialize internal packet-
buffer RAM pointers. Software must reset both transmit and receive operation (using
the global device reset CTRL.SWRST bit) after changing this register in order for it to
take effect. The PBA register itself is not reset by assertion of the software reset, but is
only reset upon initial hardware power on.
If early receive functionality is not enabled (indicate field/register), the receive packet
buffer should be larger than the maximum expected received packet + 32 bytes.
For best performance, the transmit buffer allocation should be set to accept two full-
sized packets.
Transmit packet buffer size should be configured to be more than 4 KB.
0
6:1
31:7
4:0
15:5
20:16
31:21
5:0
31:6
Bit
Bit
Bit
RW
RO
RO
RO
RO
RO
RW
RW
Type
Type
Type
0b
0x20
0x0
0x
0x
X
X
0x0
0x0
Reset
Reset
Reset
Invert Polarity. Indicates to the GP unit to invert bit polarity (only
receiver). this bit is set from the NVM.
Command Mode Voltage Select.
Reserved. Read as 0b ignore on write.
Receive packet buffer allocation (RXA). Defines the size of the Rx buffer in
K byte units. Default is KB.
Reserved.
Transmit Packet Buffer Allocation (TXA). Defines the size of the Tx buffer in
KB units. This field is read only and equals to the Packet Buffer Size (PBS)
minus RXA (the default value of the PBS is KB).
Reserved.
Packet Buffer Size (PBS). Defines the total packet buffer size both for
transmit and receive in 1 KB granularity. Software should keep this
register at a value of decimal (equals KB).
Reserved. Read as zero.
Description
Description
Description
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