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參數(shù)資料
| 型號(hào)： | DM9102A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Single Chip Fast Ethernet NIC controller |
| 中文描述： | 單芯片快速以太網(wǎng)網(wǎng)卡控制器 |
| 文件頁(yè)數(shù)： | 55/77頁(yè) |
| 文件大?。?/td> | 459K |
| 代理商： | DM9102A |
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DM9102A
Single Chip Fast Ethernet NIC controller
Final
Version: DM9102A-DS-F03
August 28, 2000
55
2. Transmit Data Buffer Processing
When start/stop transmit command is set and the DM9102A
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
DM9102A 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
DM9102A 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 DM9102A can resume.
Transmit Buffer Management State Transition
Stop State
Descriptor
Access
Data
Transfer
Write
Status
Suspended
Buffer Available
( OWN bit = 1 )
Frame Fully Transmited
Start Transmit Command Or
Transmit Poll Command
Under FIFO Threshold
Buffer not Empty
Buffer Empty
Transmit Buffer Unavailable
( Owned By Host )
Transmit Poll Command
Stop Transmit Command Or
Reset Command
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DM9102AF | Single Chip Fast Ethernet NIC controller |
| DM9102AT | Single Chip Fast Ethernet NIC controller |
| DM9108APPLICATIONENGINEERINGNOTESONE | DM9108 Application Engineering notes one |
| DM9108APPLICATIONENGINEERINGNOTESTHREE | DM9108 Application Engineering notes three |
| DM9108APPLICATIONENGINEERINGNOTESTWO | DM9108 Application Engineering notes two |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DM9102AF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single Chip Fast Ethernet NIC controller |
| DM9102AT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single Chip Fast Ethernet NIC controller |
| DM9102D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SINGLE CHIP FAST ETHEMET NIC CONTROLLER |
| 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 |
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