Intel 82547EI, Руководство по конструкции

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82562EZ(EX)/82547GI(EI) Dual Footprint Design Guide
16
For non-ASF applications, use a 64 register by 16-bit Microwire serial EEPROM. For ASF 1.0
applications, use larger 93C66 Microwire or AT25040 SPI* Serial EEPROM. ASF 2.0 requires an
8K SPI* Serial EEPROM.
Intel has an MS-DOS* software utility called EEUPDATE, which can be used to program
EEPROM images in development or production line environments. To obtain a copy of this
program, contact your Intel representative.
The EEPROM access algorithm programmed into the 82547GI(EI) controller is compatible with
most, but not all, commercially available 3.3 V Microwire interface, serial EEPROM devices, with
64 x 16 (or 256 x 16) organization and a 1 MHz speed rating. The 82547GI(EI)'s EEPROM access
algorithm drives extra pulses on the shift clock at the beginnings and ends of read and write cycles.
The extra pulses may violate the timing specifications of some EEPROM devices. In selecting a
serial EEPROM, choose a device that specifies “don't care” shift clock states between accesses.
Microwire EEPROMs that have been found to work satisfactorily with the 82547GI(EI) Gigabit
Ethernet Controller are listed in the following table:
SPI* EEPROMs that have been found to work satisfactorily with the 82547GI(EI) device are listed
in
Table 11 . SPI EEPROMs must be rated for a clock rate of at least 2 MHz.
Table 10. Microwire 64 x 16 Serial EEPROMs
Manufacturer Manufacturer's Part Number
Atmel AT93C46
Catalyst CAT93C46
1
1. Revision H is not supported. Product die revision letter is marked on top of the package as a suffix to the production data
code (e.g., AYWWH.)
Table 11. SPI Serial EEPROMs for 82547GI(EI) Controller
Application Manufacturer
Manufacturer's Part
Number
ASF 1.0 or IPMI Pass Through Atmel AT25040
ASF 2.0 or IPMI Advanced Pass Through Atmel AT25080