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IP100
BIT
1
IP100-DS-R03
May 27, 2003
49/92
Copyright
2003, IC Plus Corp.
All rights reserved.
Preliminary, Specification subject to change without notice.
BIT NAME
HostError
R/W
R/W
BIT DESCRIPTION
Host Error Interrupt. HostError is a logic 1 when a catastrophic error
related to the bus interface occurs. Catastrophic bus interface errors
include PCI target abort and PCI master abort.
A HostError interrupt requires a setting the GlobalReset and DMA bits
of the AsicCtrl register.
Transmit Complete. TxComplete is a logic 1 when a frame whose
TxIndicate bit in the TFD’s TxFrameControl field is a logic 1, has been
successfully transmitted or for any frame that experiences a
transmission error.
A TxComplete interrupt requires writing to TxStatus register to
advance the status queue.
MAC Control Frame Received Interrupt. MACControlFrame is a logic
1 when a MAC Control frame has been received by the IP100.
Receive Complete Interrupt. RxComplete is a logic 1 when one or
more entire frames have been received into the receive FIFO.
RxComplete is automatically acknowledged by the receive DMA logic
as it transfers frames.
Reserved for future use.
Interrupt Requested Interrupt. IntRequested is a logic 1 after the host
system requests an interrupt by setting InterruptRequest bit of the
AsicCtrl register or via the expiration of the Countdown register.
Update Statistics Interrupt. UpdateStats is a logic 1 to indicate that
one or more of the statistics registers is nearing an overflow condition
(typically half of its maximum value). The host system should respond
to an UpdateStats interrupt by reading all of the statistic registers,
thereby acknowledging and clearing UpdateStats bit.
Link Event Interrupt. LinkEvent is a logic 1 to indicate a change in the
state of the Ethernet link.
Transmit DMA Complete Interrupt. TxDMAComplete is a logic 1 to
indicate that a transmit DMA operation has completed, and the
frame’s corresponding TFD had the TxDMAComplete bit in the
TxFrameControl field set to a logic 1.
Receive DMA Complete Interrupt. RxDMAComplete is a logic 1 to
indicate that a frame receive DMA operation has completed.
Reserved for future use.
Modem Interrupt. Reserved/ModemInt is a logic 1 to indicate that the
MINT signal has been asserted.
Reserved for future use.
2
TxComplete
R/W
3
MACControlFrame
R/W
4
RxComplete
R/W
5
6
Reserved
IntRequested
R/W
R/W
7
UpdateStats
R/W
8
LinkEvent
R/W
9
TxDMAComplete
R/W
10
RxDMAComplete
R/W
11
Reserved/
ModemInt
N/A
R/W
15..12
Reserved
N/A
10.4.17 IntStatusAck
Class............................. LAN I/O Registers, Interrupt
Base Address ............... IoBaseAddress register value
Address Offset .............. 0x4a
Default .......................... 0x0000
Width ............................ 16 bits