- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361795 > W89C880F LAN Hub Controller PDF資料下載
參數(shù)資料
| 型號： | W89C880F |
| 英文描述： | LAN Hub Controller |
| 中文描述： | 局域網(wǎng)集線器控制器 |
| 文件頁數(shù)： | 40/72頁 |
| 文件大小： | 731K |
| 代理商： | W89C880F |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁當前第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁
W89C840F
- 40 -
7
R/W
RBU
Receive Buffer Unavailable.
When there is no receive buffer available, this bit is set and the
receive process enters the suspend state.
When W89C840F is first initialized, this bit will not be set even if
there is no buffer available. It
i s
set only when there has been any
available buffer and no available buffer afterwards.
The RBU will not accumulate the number of the receive buffer
unavailable event, i.e. the write an 1‘s value to RBU will clear the
RBU no matter how many times the receive buffer unavailable has
been occurred before the RBU is cleared.
6
R/W
RINI
Receive Interrupt
A high indicates that a frame has been received and the receive
status is transferred into the receive descriptors of the current frame.
5
R/W
IUF
Transmit FIFO Under-flow
A high indicates that the transmit FIFO had an under-flow error
during the packet transmission.
After the FIFO under-flow occurred, the transmit DMA will not
continue to fetch the un-transmitted data of the current frame but
fetch the descriptor of the current frame for looking for the last
descriptor of the current frame. The W89C840F‘s transmit DMA
state machine will write the transmit status to the last descriptor of
the current frame with a 1’s value for the bit 1 of Transmit
Descriptor 0 (T00[1]).
The W89C840F will continue to transmit next packet when the
current frame transmit status is updated..
4
R/W
RERR
Receive Error.
A high indicates that the receive DMA detects a receive error
during the packet reception.
The receive DMA will set this bit when some prior received data of
the current incoming packet have been moved into the data buffer in
the host memory and some kind of error occurred when receiving
the posterior data of the current incoming packet from the MII bus.
The INTAB
i s
asserted when a receive error is detected and the
receive error interrupt enable is unmasked
,
the error packet will be
aborted.
3
R/W
REI
Receive Early Interrupt
The REI
i s
set when the number of the data of the incoming frame,
in long word unit, transferred to the data buffer reaches Receive
Early Interrupt Threshold specified by the register C18/CNCR if
Receive Early Interrupt On in the register C18/CNCR is set.
This bit
i s
cleared automatically after Receive Interrupt (RINI) or
Receive Error (RERR) is set..
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W89C840F | 100/10Mbps Ethernet Controller(100/10Mbps以太網(wǎng)控制器) |
| W89C92P | 10M CMOS Coaxial Transceiver |
| W89C940F | 10M PCI-Bus Ethernet Network Interface Controller |
| W91040 | |
| W91212 | Tone/Pulse Dialer With Redial Function(具有重撥功能的音頻/脈沖撥號器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W89C92 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER |
| W89C926 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER |
| W89C926F | 制造商:WINBOND 制造商全稱:Winbond 功能描述:10M PCMCIA Ethernet Network Interface Controller |
| W89C926PENTIC+ | 制造商:WINBOND 制造商全稱:Winbond 功能描述:PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER |
| W89C92P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10M CMOS Coaxial Transceiver |
發(fā)布緊急采購，3分鐘左右您將得到回復。