WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 226

• 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

8.9.4
8.9.4.1
8.9.4.2
226
Status Registers
If the NVM image is configured correctly, the physical connections are valid, and
problems still exist, use utilities/drivers to check the appropriate 82574 status registers
for other indications.
Firmware Semaphore Register (FWSM, 0x5B54)
This register (described in detail in the
firmware on the 82574 is functioning properly and if so, in what mode.
Check the error indication bits (24:19), if they are anything other than zero, then the
firmware is not going to be fully functional, if at all.
The most common errors are:
If bits 3:1 of the register indicate a firmware mode that is reserved, this error condition
can be reset.
Always make note of the firmware mode, bits 3:1. In nearly all cases, this value should
be set to 010b for pass-through mode to an external MC.
The firmware valid bit (15) should be set to 1b to indicate that the firmware is up and
running. If it is not set to 1b, then an error code should be indicated in bits 24:19.
The reset count bits (18:16) indicate how many times the internal firmware on the
82574 has been reset. This value should be a one (the firmware was reset at power
up). If the value is greater than one then there are issues somewhere. Note that this
counter goes from 0-7 and wraps around.
Management Control Register (MANC 0x5820)
This register is described in detail in the
This register indicates which filters are enabled. It is possible to configure all of the
filters yet not enable them, in which case, no management traffic is routed to the MC.
Or, the MC might be receiving undesired traffic, such as ARP requests when the 82574
was configured to do automatic ARP responses.
Check this register if getting unwanted traffic or if packets aren’t getting sent to the
MC.
Bit 17 (Receive TCO Packets Enable) must also be set in order for any packets are sent
to a MC. Note that it doesn’t matter what the other enabled filters are, if this one is off,
no packets are sent to the MC.
Bit 21 (Enable Management-to-Host) enables or disables the various filters that also
enable manageability traffic (all those that pass the filters in the 82574) to optionally
be passed to the operating system.
• NVM checksum errors - these can be caused by a number of things:
• Invalid Firmware Mode (0x08)
— Mismatch in 82574 stepping and NVM image version (old NVM image on a new
— NVM part too small (recommended minimum size for manageability is 32 Kb)
— Old utility was used to update the NVM (always make sure to have the latest
82574)
versions)
section
section
10.0) provides a way to find out if the
82574 GbE Controller—System Manageability
10.0.