Intel 82557 Benutzerhandbuch
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Intel 8255x 10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
Adapter and Controller Overview
2.2
Intel Fast Ethernet MAC Features
2.2.1
82557 Features
•
Glueless 32-bit, zero wait state PCI bus master interface compliant with PCI Specification,
Revision 2.1.
•
10 and 100 Mbps support in compliance with IEEE 802.3 10BASE-T and 802.3u 100BASE-
TX.
•
Fast back-to-back transmit interframe spacing (IFS) of 960 ns in 100 Mbps networks and 9.6
µs in 10 Mbps networks.
µs in 10 Mbps networks.
•
On-chip Control/Status Register (CSR) incorporating the System Control Block (SCB).
•
Simple and flexible packet support with Dynamic transmit chaining.
•
Packed Transmit Buffer Descriptors (TBDs).
•
Early transmit complete indication.
•
Simple receive packet support allows early receive interrupt support for concurrent processing
(in simplified mode).
(in simplified mode).
•
IEEE Media Independent Interface (MII) compliant PHY interface other MII compliant PHYs.
•
Full and half duplex transmit and receive capability.
•
Separate on-chip receive and transmit FIFOs.
•
On-chip network management counters.
•
EEPROM support.
•
Optional Flash ROM support (256 Kbytes or 1 Mbyte).
2.2.2
82558 Features
For the most part, the 82558 is a superset of the 82557. In addition to incorporating the features of
the 82557, it also includes the following:
the 82557, it also includes the following:
•
Backward compatible to 82557 software.
•
Integrated 100BASE-TX PHY.
•
IEEE 802.3u auto-negotiation support in 10BASE-T, 100BASE-TX, full duplex and full
duplex flow control configurations.
•
Auto-polarity correction for 10BASE-T.
•
Optimized PCI interface with support for the memory write and invalidate PCI command.
•
Automatic read of EEPROM (programmable ID).
•
IEEE 802.3x flow control capable.
•
PHY based flow control support when the internal 100BASE-TX PHY is used.
•
Advanced Configuration and Power Interface (ACPI) Specification and PCI Power
Management Specification compliant.
Management Specification compliant.
•
Remote power up support (for Magic Packet*).