WG82577LM S LGWS Intel, WG82577LM S LGWS Datasheet - Page 137

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

Specifications of WG82577LM S LGWS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Intel
Note:
10.2.1.1.10 Flow Control Refresh Threshold Value - FCRTV (0x05F40; RW)
10.2.1.1.11 Extended Configuration Control - EXTCNF_CTRL (0x00F00; RW)
®
5 Series Express Chipset MAC Programming Interface—82577 GbE PHY
The 16-bit value in the TTV field is inserted into a transmitted frame (either XOFF
frames or any PAUSE frame value in any software transmitted packets). It counts in
units of slot time. If software needs to send an XON frame, it must set TTV to zero prior
to initiating the PAUSE frame.
The MAC uses a fixed slot time value of 64 byte times.
15:0
31:16
0
2:1
3
4
5
6
15:7
27:16
31:28
Bit
Bit
RW
RO
RW/SN
RW/SN
RW/SN
RO
RW/V
RO/V
RO
RW/SN
RW
Type
Type
X
0x0
0b
00b
1b
0b
0b
0b
0x0
0x001
0b
Reset
Reset
LCD Write Enable. When set, enables the extended PHY configuration area
in the MAC. When disabled, the extended PHY configuration area is
ignored. Loaded from NVM word 0x14.
Reserved
OEM Write Enable. When set, enables auto load of the OEM bits from the
PHY_CTRL register to the PHY. Loaded from NVM word 0x14.
Reserved.
Software Semaphore FLAG (SWFLAG). This bit is set by the device driver
to gain access permission to shared CSR registers with the firmware and
hardware.
The bit is initialized on power up PCI reset and software reset.
MDIO Hardware Ownership. Hardware requests access to MDIO. Part of
the arbitration scheme for MDIO access. This is a RO bit.
Reserved.
Extended Configuration Pointer. Defines the base address (in Dwords) of
the extended configuration area in the NVM.
Reserved.
Flow Control Refresh Threshold (FCRT). This value indicates the threshold
value of the flow control shadow counter. When the counter reaches this
value, and the conditions for a pause state are still valid (buffer fullness
above low threshold value), a pause (XOFF) frame is sent to the link
partner.
The FCRTV timer count interval is the same as other flow control timers
and counts at slot times of 64 byte times.
If this field contains a zero value, the flow control refresh is disabled.
Reserved. Read as 0b. Should be written to 0b for future compatibility.
Description
Description
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