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參數(shù)資料
| 型號： | LAN91C100 |
| 廠商： | SMSC Corporation |
| 英文描述： | FEAST⑩ Fast Ethernet Controller |
| 中文描述： | 宴⑩快速以太網(wǎng)控制器 |
| 文件頁數(shù)： | 53/101頁 |
| 文件大?。?/td> | 312K |
| 代理商： | LAN91C100 |
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53
TYPICAL FLOW OF EVENTS FOR TRANSMIT
S/W DRIVER
MAC SIDE
1
ISSUE ALLOCATE MEMORY FOR TX - N
BYTES - the MMU attempts to allocate N
bytes of RAM.
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.
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.
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.
2
3
4
5
The enqueued packet will be transferred to the
MAC block as a function of TXENA (n TCR) bit
and of the deferral process state.
Upon transmit completion the first word in
memory is written with the status word. The
packet number is moved from the TX FIFO
into the TX completion FIFO. Interrupt is
generated by the TX completion FIFO being
not empty.
6
7
SERVICE INTERRUPT - Read Interrupt Status
Register. If it is a transmit interrupt, read the
TX Done Packet Number from the Fifo Ports
Register. Write the packet number into the
Packet Number Register. The corresponding
status word is now readable from memory. If
status word shows successful transmission,
issue RELEASE packet number command to
free up the memory used by this packet.
Remove packet number from completion FIFO
by writing TX INT Acknowledge Register.
相關PDF資料 |
PDF描述 |
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| LAN91C110 | FEAST FAST ETHERNET CONTROLLER FOR PCMCIA AND GENERIC 16-BIT APPLICATIONS |
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| LAN91C100FD(208TQFP) | LAN Node Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LAN91C100FD | 制造商:- 功能描述: 制造商:SMSC 功能描述: |
| LAN91C100-FD | 制造商:SMSC 制造商全稱:SMSC 功能描述:FEAST Fast Ethernet Controller with Full Duplex Capability |
| LAN91C100FD(208PQFP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller |
| LAN91C100FD(208TQFP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller |
| LAN91C100FD_06 | 制造商:SMSC 制造商全稱:SMSC 功能描述:FEAST Fast Ethernet Controller with Full Duplex Capability |
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