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| 型號(hào)： | LAN91C100-FD-SS |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | FEAST Fast Ethernet Controller with Full Duplex Capability |
| 中文描述： | 2 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP208 |
| 封裝： | GREEN, QFP-208 |
| 文件頁(yè)數(shù)： | 45/67頁(yè) |
| 文件大?。?/td> | 369K |
| 代理商： | LAN91C100-FD-SS |
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SMSC DS – LAN91C100FD REV. B
Page 45
Rev. 01-20-06
2) One interrupt per sequence of packets: Enable TX EMPTY INT and TX INT, set AUTO RELEASE=1. TX EMPTY
INT is generated only after transmitting the last packet in the FIFO.
TX INT will be set on a fatal transmit error allowing the CPU to know that the transmit process has stopped and
therefore the FIFO will not be emptied.
This mode has the advantage of a smaller CPU overhead, and faster memory de-allocation. Note that when
AUTO RELEASE=1 the CPU is not provided with the packet numbers that completed successfully.
Note:
The pointer register is shared by any process accessing the LAN91C100FD memory. In order to allow
processes to be interruptable, the interrupting process is responsible for reading the pointer value before modifying it,
saving it, and restoring it before returning from the interrupt.
Typically there would be three processes using the pointer:
1) Transmit loading (sometimes interrupt driven)
2) Receive unloading (interrupt driven)
3) Transmit Status reading (interrupt driven).
1) and 3) also share the usage of the Packet Number Register. Therefore saving and restoring the PNR is also
required from interrupt service routines.
FIGURE 11 - INTERRUPT GENERATION FOR TRANSMIT, RECEIVE, MMU
TX
FIFO
TX COFIFO
'NOT EMPTY'
RX
CSMA/CD
LOGICAL
ADDRESS
PACKET #
MMU
PHYSICAL ADDRESS
RAM
CPU ADDRESS
CSMA ADDRESS
RX PACKET
NUMBER
RX FIFO
PACKET NUMBER
PACKET NUMBER
REGISTER
PACK # OUT
M.S. BIT ONLY
'EMPTY'
TX DONE
PACKET NUMBER
'NOT EMPTY'
INTERRUPT
STATUS REGISTER
RCV
INT
TX EMPTY
INT
TX
INT
ALLOC
INT
TWO
OPTIONS
相關(guān)PDF資料 |
PDF描述 |
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| LAN91C100-FD | FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY |
| LAN91C100FD | FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY |
| LAN91C100FDREVD | FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY |
| LAN91C100FDREVB | FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY |
| LAN91C100FDTQFP | FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LAN91C100FD-SS | 功能描述:以太網(wǎng) IC Non-PCI 10/100 Ethernet MAC RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| LAN91C100-FD-ST | 制造商:SMSC 制造商全稱:SMSC 功能描述:FEAST Fast Ethernet Controller with Full Duplex Capability |
| LAN91C100FD-ST | 功能描述:以太網(wǎng) IC Non-PCI 10/100 Ethernet MAC RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| LAN91C100FDTQFP | 功能描述:以太網(wǎng) IC Non-PCI 10/100 Ethernet MAC RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| LAN91C100QFP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:SMSC 功能描述: |
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