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296 Software Developer’s Manual
Register Descriptions
13.4.19 Interrupt Cause Set Register
ICS (000C8h; W)
Software uses this register to set an interrupt condition. Any bit written with a 1b sets the
corresponding interrupt. This results in the corresponding bit being set in the Interrupt Cause Read
Register (see Section 13.4.17). A PCI interrupt is generated if one of the bits in this register is set
and the corresponding interrupt is enabled through the Interrupt Mask Set/Read Register (see
Section 13.4.20).
Bits written with 0b are unchanged.
Table 13-64. ICS Register Bit Description
31 17 16 0
Reserved ICS Bits
Field Bit(s)
Initial
Value
Description
TXDW 0 X Sets Transmit Descriptor Written Back Interrupt.
TXQE 1 X Sets Transmit Queue Empty Interrupt.
LSC 2 X Sets Link Status Change Interrupt.
RXSEQ 3 X
Sets Receive Sequence Error Interrupt.
This is a reserved bit for the 82541xx and 82547GI/EI. Set to
0b.
RXDMT0 4 X
Sets Receive Descriptor Minimum Threshold Reached
Interrupt.
Reserved 5 X
Reserved
Should be written with 0b to ensure future compatibility.
RXO 6 X Sets on Receiver FIFO Overrun Interrupt.
RXT0 7 X Sets Receiver Timer Interrupt.
Reserved 8 X
Reserved
Should be written with 0b to ensure future compatibility.
MDAC 9 X Sets MDI/O Access Complete Interrupt.
RXCFG 10 X
Sets Receiving /C/ ordered sets Interrupt.
This is a reserved bit for the 82541xx and 82547GI/EI. Set to
0b.
Reserved 11 X
Reserved
Should be written with 0b to ensure future compatibility.
Not applicable to the 82544GC/EI.
PHYINT 12 X
Sets PHY interrupt. Not applicable to the 82544GC/EI.
This is a reserved bit for the 82541xx and 82547GI/EI. Set to
0b.