82583V Datasheet, PDF (41/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

Initialization—82583V GbE Controller
A
Read signature at word
0x12
~0
Bad
signature
Read signature at word
2K+0x12
~0
Bad
signature
82583V set to default
values
Set EEC.Auto_RD
0
Good
signature
Load sector 1 to Shadow
RAM
Set EEC.SHADV & set
EEC.SEL1VAL
~2.1
1
Good
signature
Load sector 0 to Shadow
RAM
Set EEC.SHADV & clear
EEC.SEL1VAL
~2.1
1
Load base area (0x00-
0x40) from Shadow
RAM
~0.0032
2
Clear Write Protection
Set Flash write status
enable and write status
0.008
3
C
Figure 10.
82583V Initialization - Flash Load
Notes:
1. A 4 KB sector is read in a single burst, so the packet overhead is negligible. The
rate is 4 KB x 8 bits / 15.625 Mb/s = 2.1 ms.
2. The shadow RAM is read at the rate of one word every ~3 clocks of 62.5 MHz, or
~50 ns per word. The 64 words are read in 3.2 ms.
3. Clear write protection is required for an SST* Flash only. The instruction codes that
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
82583V 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.
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