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參數(shù)資料
| 型號： | LAN91C94 |
| 廠商： | SMSC Corporation |
| 英文描述： | ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM |
| 中文描述： | 的ISA / PCMCIA的單芯片以太網(wǎng)控制器與RAM |
| 文件頁數(shù)： | 38/55頁 |
| 文件大?。?/td> | 482K |
| 代理商： | LAN91C94 |
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FEAST Fast Ethernet Controller
for PCMCIA and Generic 16-Bit Applications
SMSC DS – LAN91C110 REV. B
Page 38
Rev. 09/05/02
Typical Flow of Events for Receive
S/W DRIVER
MAC SIDE
1 ENABLE RECEPTION - By setting the RXEN
bit.
2
A packet is received with matching address.
Memory is requested from MMU. A packet
number is assigned to it. Additional memory is
requested if more pages are needed.
3
The internal DMA logic generates sequential
addresses and writes the receive words into
memory. The MMU does the sequential to
physical address translation. If overrun, packet
is dropped and memory is released.
4
When the end of packet is detected, the status
word is placed at the beginning of the receive
packet in memory. Byte count is placed at the
second word. If the CRC checks correctly the
packet number is written into the RX FIFO. The
RX FIFO, being not empty, causes RCV INT
(interrupt) to be set. If CRC is incorrect the
packet memory is released and no interrupt will
occur.
5 SERVICE INTERRUPT - Read the Interrupt
Status Register and determine if RCV INT is set.
The next receive packet is at receive area. (Its
packet number can be read from the FIFO Ports
Register). The software driver can process the
packet by accessing the RX area, and can move
it out to system memory if desired. When
processing is complete the CPU issues the
REMOVE AND RELEASE FROM TOP OF RX
command to have the MMU free up the used
memory and packet number.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LAN91C110TQFP | FEAST FAST ETHERNET CONTROLLER FOR PCMCIA AND GENERIC 16-BIT APPLICATIONS |
| LAN91C96I | NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER |
| LAN91C96I-MS | NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER |
| LAN91C96I-MU | NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER |
| LAN91C96IQFP | NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LAN91C94TQFP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:SMSC 功能描述: |
| LAN91C95 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller |
| LAN91C95TQFP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:SMSC 功能描述: |
| LAN91C95TQFP WAF | 制造商:SMSC 功能描述: |
| LAN91C96 | 制造商:SMSC 功能描述: |
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