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| 型號(hào)： | LAN91C96(100TQFP) |
| 英文描述： | LAN Node Controller |
| 中文描述： | 網(wǎng)絡(luò)節(jié)點(diǎn)控制器 |
| 文件頁(yè)數(shù)： | 13/55頁(yè) |
| 文件大?。?/td> | 482K |
| 代理商： | LAN91C96(100TQFP) |
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FEAST Fast Ethernet Controller
for PCMCIA and Generic 16-Bit Applications
SMSC DS – LAN91C110 REV. B
Page 13
Rev. 09/05/02
DATA STRUCTURES AND REGISTERS
PACKET FORMAT IN BUFFER MEMORY
The packet format in memory is similar for the Transmit and Receive areas. The first word is reserved for the status word.
The next word is used to specify the total number of bytes, and it is followed by the data area. The data area holds the
packet itself.
FIGURE 5 - DATA PACKET FORMAT
TRANSMIT PACKET
RECEIVE PACKET
STATUS WORD
Written by CSMA upon transmit
completion (see Status Register)
Written by CSMA upon receive
completion (see RX Frame
Status Word)
Written by CSMA
BYTE COUNT
Written by CPU
DATA AREA
Written/modified by CPU
Written by CSMA
CONTROL BYTE
Written by CPU to control
odd/even data bytes
Written by CSMA; also has
odd/even bit
BYTE COUNT - Divided by two, it defines the total number of words including the STATUS WORD, the BYTE
COUNT WORD, the DATA AREA and the CONTROL BYTE.
The receive byte count always appears as even; the ODDFRM bit of the receive status word indicates if the low byte of
the last word is relevant.
RESERVED
BYTE COUNT (always even)
STATUS WORD
DATA AREA
LAST DATA BYTE (if odd)
bit0
bit15
RAM
OFFSET
(DECIMAL)
0
2
4
2046 Max
CONTROL BYTE
Last Byte
1st Byte
2nd Byte
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相關(guān)代理商/技術(shù)參數(shù) |
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| LAN91C96I | 制造商:SMSC 制造商全稱:SMSC 功能描述:NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER |
| LAN91C96I_07 | 制造商:SMSC 制造商全稱:SMSC 功能描述:Non-PCI Single-Chip Full Duplex Ethernet Controller |
| LAN91C96IMS | 制造商:Microchip Technology Inc 功能描述: |
| LAN91C96I-MS | 功能描述:以太網(wǎng) IC Non-PCI 10 Mbps 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 |
| LAN91C96I-MU | 功能描述:以太網(wǎng) IC Non-PCI 10 Mbps 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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