WG82574IT S LBAC Intel, WG82574IT S LBAC Datasheet - Page 67
WG82574IT S LBAC
Manufacturer Part Number
WG82574IT S LBAC
Description
CONTROLLER, ENET, INTEL 82574IT, 64PQFN
Manufacturer
Intel
Datasheet
1.WG82574IT_S_LBAC.pdf
(490 pages)
Specifications of WG82574IT S LBAC
Ethernet Type
IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supply Voltage Range
3V To 3.6V
Operating Temperature Range
-40°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
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Initialization—82574 GbE Controller
Figure 11.
82574L Initialization - Flash Load
Notes:
1. A 4 KB sector is read in a single burst, so the packet overhead is negligible. The
2. The shadow RAM is read at the rate of one word every ~3 clocks of 62.5 MHz, or
3. Clear write protection is required for an SST* Flash only. The instruction codes that
rate is 4 KB x 8 bits / 15.625 Mb/s = 2.1 ms.
~50 ns per word. The 64 words are read in 3.2 ms.
are required to initiate are hardwired in the design as defined by SST 25xxx Flash
family: code 0x50 for write status enable and code 0x01 for status write. The
82574L writes a data of 0x00 to the status word which clears all protection.
Software accesses to the Flash are not executed until this step completes.
signature
82574 set to default
Bad
Set EEC.Auto_RD
Read signature at word
0
values
~0
2K+0x12
signature
Bad
Load sector 1 to Shadow
Set EEC.SHADV & set
signature
Good
~2.1
Read signature at word
EEC.SEL1VAL
RAM
~0
C
0x12
A
1
Load sector 0 to Shadow
enable and write status
Set EEC.SHADV & clear
Load base area (0x00-
Clear Write Protection
Set Flash write status
signature
0x40) from Shadow
~0.0032
Good
0.008
~2.1
EEC.SEL1VAL
RAM
RAM
2
3
1
67
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