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參數(shù)資料
| 型號： | DM9102D |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SINGLE CHIP FAST ETHEMET NIC CONTROLLER |
| 中文描述： | 單晶片快速以太網(wǎng)NIC控制器 |
| 文件頁數(shù)： | 48/70頁 |
| 文件大?。?/td> | 2245K |
| 代理商： | DM9102D |
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48
Preliminary datasheet
Version: DM9102D-DS-P02
Jan. 14, 2005
7.2.3 Transmit Data Buffer Processing
Refer to Figure 7-3. When start/stop transmit command is
set and the DM9102D is in running state, transmit process
polls transmit descriptor list for frames requiring
transmission. When it completes a frame transmission, the
status related to the transmitted frame will be written into the
transmit descriptor. If the DM9102D detects a descriptor
flagged as owned by the host and no transmit buffers are
available, transmit process will be suspended. While in the
running state, transmit process can simultaneously acquire
two frames. As transmit process completes copying the first
frame, it immediately polls transmit descriptor list for the
second frame. If the second frame is valid, transmit process
copies the frame before writing the status information of the
first frame.
Both conditions will make transmit process suspend. (i) The
DM9102D detects a descriptor owned by the host. (ii) A
frame transmission is aborted when a locally induced error is
detected. Under either condition, the host driver has to
service the condition before the DM9102D can resume.
Transmit Buffer Management State Transition
Figure 7-3
Stop State
Descriptor
Access
Data
Transfer
Write
Status
Suspended
Buffer Available
( OWN bit = 1 )
Under FIFO Threshold
Frame Fully Transmited
Start Transmit Command or
Transmit Poll Command
Buffer not Empty
Buffer Empty
Transmit Buffer Unavailable
( Owned By Host )
Transmit Poll
Stop Transmit Command or
Reset Command
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DM9102DE | SINGLE CHIP FAST ETHEMET NIC CONTROLLER |
| DM9102 | Single Chip Fast Ethernet NIC controller |
| DM9102A | Single Chip Fast Ethernet NIC controller |
| DM9102AF | Single Chip Fast Ethernet NIC controller |
| DM9102AT | Single Chip Fast Ethernet NIC controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DM9102DE | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Single Chip Fast Ethernet NIC Controller |
| DM9102DEP | 制造商:DAVICOM 功能描述:IC ENET CNTRL 10/100M PHY 1 制造商:DAVICOM 功能描述:IC ENET CNTRL 10/100M PHY 128LQFP 制造商:DAVICOM 功能描述:IC, ENET CNTRL, 10/100M PHY, 128LQFP 制造商:DAVICOM 功能描述:IC, ENET CNTRL, 10/100M PHY, 128LQFP; Data Rate:100Mbps; Ethernet Type:IEEE 802.3u; Supply Voltage Min:2.375V; Supply Voltage Max:2.625V; Digital IC Case Style:LQFP; No. of Pins:128; Interface Type:PCI; Operating Temperature Min:0C;;RoHS Compliant: Yes |
| DM9102H | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Single Chip Fast Ethernet NIC Controller |
| DM9102HEP | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Single Chip Fast Ethernet NIC Controller |
| DM9103 | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:10/100 Mbps 3-port Ethernet Switch Controller with PCI Interface |
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