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82543GC Gigabit Ethernet Controller Specification Update
27.
Link Status Change Interrupt Only Occurs If Link is Up ....................................................................17
28.
Early Transmit Feature Does Not Operate Correctly.........................................................................17
29.
TDO Output Not Floated When JTAG TAP Controller Inactive .........................................................18
30.
Initialization Ignores Incorrect EEPROM Signature...........................................................................18
31.
Internal Loopback Difficulties.............................................................................................................18
32.
Collision Pin Not Ignored in TBI Mode...............................................................................................18
33.
Receive Descriptor Writeback Problems for Packets Spanning Multiple Buffers ..............................19
34.
Illegal Oversize Packets Overflow Receive FIFO..............................................................................19
35.
Transmit Descriptor Writeback Problems with Non-Zero WTHRESH ...............................................19
36.
Bus Initialization with Some Chipsets ................................................................................................20
37.
Use of Receive Delay Timer Ring Register (RDTR) Causes Occasional Lockups ...........................20
38.
Transmit TCP Checksum Incorrectly Modified if Calculated as 0x0000............................................20
SPECIFICATION CLARIFICATIONS................................................................................................................21
1.
0-70C Ambient Temperature Range .................................................................................................21
2.
Receiver Enabling and Disabling.......................................................................................................21
DOCUMENTATION CHANGES ........................................................................................................................21
1.
TX/RX Descriptor Register Addresses ..............................................................................................21
2.
Auto Speed Detect Function Requires CTRL.SLU Bit to Be Set.......................................................22
3.
Values Programmed to Some Registers While in Reset Do Not Persist...........................................22
4.
JTAG Port Operation .........................................................................................................................22
5.
Register Summary Uses Improper Page Reference Format.............................................................23
6.
Change O_EN_CDET Output to NO_CONNECT .............................................................................23
7.
Change Recommended Transmit IPG Programming Value for 10/100/1000BASE-T ......................23
8.
Remove Transmit Report Status Sent Function ................................................................................23
9.
Remove Transmit DMA Pre-fetching and Preemption Functions......................................................23
10.
Remove Gigabit Half-Duplex Transmit Burst Timer Control Function (TBT).....................................24
11.
Remove Adaptive IFS Throttle Function (AIT)...................................................................................24
4
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