參數(shù)資料
型號： LAN91C100FDREVB
廠商： SMSC Corporation
英文描述： FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY
中文描述： 宴快速以太網(wǎng)控制器以全雙工能力
文件頁數(shù)： 49/79頁
文件大?。?/td> 585K
代理商： LAN91C100FDREVB
FEAST Fast Ethernet Controller with Full Duplex Capability
SMSC DS – LAN91C100FD Rev. D
Page 49
Rev.
10/14/2002
PRELIMINARY
Figure 5.7
-
Drive Send and Allocate Routines
5.5
Memory Partitioning
Unlike other controllers, the LAN91C100FD does not require a fixed memory partitioning between transmit
and receive resources. The MMU allocates and de-allocates memory upon different events. An additional
mechanism allows the CPU to prevent the receive process from starving the transmit memory allocation.
ALLOCATE
Issue "Allocate Memory"
Command to MMU
Read Interrupt Status Register
Enqueue Packet
Set "Ready for Packet" Flag
Return
Copy Remaining TX Data
Packet into RAM
Return Buffers to Upper Layer
Write Allocated Packet into
Packet # Register
Write Address Pointer Register
Copy Part of TX Data Packet
into RAM
Write Source Address into
Proper Location
Store Data Buffer Pointer
Clear "Ready for Packet" Flag
Enable Allocation Interrupt
Allocation
Passed
Yes
No
DRIVER SEND
Choose Bank Select
Register 2
Call ALLOCATE
Exit Driver Send
Read Allocation Result
Register
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LAN91C100FDREVD 制造商:SMSC 制造商全稱:SMSC 功能描述:FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY
LAN91C100-FD-SS 制造商:SMSC 制造商全稱:SMSC 功能描述:FEAST Fast Ethernet Controller with Full Duplex Capability
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
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