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參數(shù)資料
| 型號： | LAN91C110TQFP |
| 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 FOR PCMCIA AND GENERIC 16-BIT APPLICATIONS |
| 中文描述： | 4 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144 |
| 封裝： | TQFP-144 |
| 文件頁數(shù)： | 37/55頁 |
| 文件大?。?/td> | 482K |
| 代理商： | LAN91C110TQFP |
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FEAST Fast Ethernet Controller
for PCMCIA and Generic 16-Bit Applications
SMSC DS – LAN91C110 REV. B
Page 37
Rev. 09/05/02
Typical Flow of Events for Transmit (Auto Release = 1)
S/W DRIVER
MAC SIDE
1 ISSUE ALLOCATE MEMORY FOR TX - N
BYTES - the MMU attempts to allocate N bytes
of RAM.
2 WAIT FOR SUCCESSFUL COMPLETION
CODE - Poll until the ALLOC INT bit is set or
enable its mask bit and wait for the interrupt.
The TX packet number is now at the Allocation
Result Register.
3 LOAD TRANSMIT DATA - Copy the TX packet
number into the Packet Number Register. Write
the Pointer Register, then use a block move
operation from the upper layer transmit queue
into the Data Register.
4 ISSUE "ENQUEUE PACKET NUMBER TO TX
FIFO" - This command writes the number
present in the Packet Number Register into the
TX FIFO. The transmission is now enqueued.
No further CPU intervention is needed until a
transmit interrupt is generated.
5
The enqueued packet will be transferred to the
MAC block as a function of TXENA (nTCR) bit
and of the deferral process (1/2 duplex mode
only) state.
6
Transmit pages are released by transmit
completion.
7
a) The MAC generates a TXEMPTY interrupt
upon a completion of a sequence of enqueued
packets.
b) If a TX failure occurs on any packets, TX INT
is generated and TXENA is cleared, transmission
sequence stops. The packet number of the
failure packet is presented at the TX FIFO
PORTS Register.
8 a) SERVICE INTERRUPT – Read Interrupt
Status Register, exit the interrupt service
routine.
b) Option 1) Release the packet.
Option 2) Check the transmit status in the EPH
STATUS Register, write the packet number of
the current packet to the Packet Number
Register, re-enable TXENA, then go to step 4 to
start the TX sequence again.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LAN91C110-TQFP | 制造商:SMSC 功能描述: |
| LAN91C111 | 制造商:SMSC 制造商全稱:SMSC 功能描述:10/100 Non-PCI Ethernet Single Chip MAC + PHY |
| LAN91C111I-NC | 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 |
| LAN91C111INE | 制造商:SMSC 功能描述:NEW |
| LAN91C111I-NE | 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 |
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