AM79C976 Advanced Micro Devices, AM79C976 Datasheet - Page 97
AM79C976
Manufacturer Part Number
AM79C976
Description
PCnet-PRO 10/100 Mbps PCI Ethernet Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C976.pdf
(309 pages)
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boundary in the EEPROM. If an even number of regis-
ters need to be loaded from the EEPROM, two dupli-
cate entries for the same register can be included so
that the CRC is aligned properly.
For full compatibility with legacy Magic Packet soft-
ware, the EEPROM should initialize both the APROM
area (offset 0-0Fh) and the PADR Register.
8/01/00
P R E L I M I N A R Y
Am79C976
Data are shifted into or out of the EEPROM most sig-
nificant bit first.
Figure 41 shows the mapping of the 3-byte entries into
the 16-bit word-oriented EEPROM.
If the Am79C976 device detects a CRC error in the EE-
PROM or fails to detect the presence of an EEPROM,
it restores all registers to their default values and clears
the PVALID bit in BCR19 to indicate the error.
97
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