Intel 82543GC 사용자 설명서
82543GC Gigabit Ethernet Controller Specification Update
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Implication:
Data transfer performance is substantially reduced due to error packets.
Workaround:
None.
Status:
Intel resolved this erratum in the A1 stepping of the 82543GC Gigabit Ethernet Controller.
8. 48 Bit Preambles Sent in 10Mb and 100Mb Operation
Problem:
The 82543GC device transmits 48 bit preambles instead of 56 bit preambles for 10Mb and 100Mb operation.
Implication:
Certain 10Mb and 100Mb repeaters will only tolerate 56 bit preambles, so packets transmitted by the 82543GC
controller will be incompatible. A product example is the Intel InBusiness 4 Port Fast Hub, which is based on a
Broadcom 5205 repeater device.
controller will be incompatible. A product example is the Intel InBusiness 4 Port Fast Hub, which is based on a
Broadcom 5205 repeater device.
Workaround: None.
Status:
Intel resolved this erratum in the A1 stepping of the 82543GC Gigabit Ethernet Controller.
9. CRS Detection Takes Too Long in MII Half-Duplex Mode
Problem:
When the 82543GC controller is operated in half-duplex mode, it can take up to 16 bit times to detect Carrier
Sense (CRS) assertion.
Sense (CRS) assertion.
Implication:
The IEEE specification is 8 bit times. Functional problems are not anticipated in operating networks, however.
Workaround: None.
Status:
Intel resolved this erratum in the A1 stepping of the 82543GC Gigabit Ethernet Controller.
10. DMA Early Receive Function Does Not Work
Problem:
When DMA early receive operation is enabled on the 82543GC device and a DMA receive underrun occurs, the
controller may erroneously place data into the packet descriptors.
controller may erroneously place data into the packet descriptors.
Implication:
The early receive function cannot be used.
Workaround: None.
Status:
Intel does not plan to resolve this erratum in a future stepping of the 82543GC Gigabit Ethernet Controller.
11. ILOS Bit Copied Incorrectly from EEPROM to Speed Bits
Problem:
When the 82543GC controller loads configuration information from EEPROM, it maps the Invert Loss of Signal
(ILOS) bit into the Speed Selection bits in the device control register.
(ILOS) bit into the Speed Selection bits in the device control register.
Implication:
Both the ILOS and Speed settings will be incorrect.
Workaround:
Software should write correct bit values into the control register.
Status:
Intel resolved this erratum in the A1 stepping of the 82543GC Gigabit Ethernet Controller.
12. Gigabit Half-Duplex Mode Operates Incorrectly
Problem:
Several problems prevent proper gigabit half-duplex operation.
Implication:
Do not use GMII half-duplex operation. GMII full-duplex and MII (10/100Mb) half-duplex modes are unaffected.