WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 65

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WG82574L S LBA8

Manufacturer Part Number
WG82574L S LBA8
Description
Manufacturer
Intel
Datasheet

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
Initialization—82574 GbE Controller
Figure 11.
82574 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
82574 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
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