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參數資料
| 型號： | W89C840AF |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 100/10Mbps Ethernet Controller |
| 中文描述： | 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP128 |
| 封裝： | PLASTIC, QFP-128 |
| 文件頁數： | 72/82頁 |
| 文件大小： | 918K |
| 代理商： | W89C840AF |
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W89C840AF
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72
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Publication Release Date:October 2000
Revision 1.01
23
PD
Padding Disable:
The W89C840AF does not add the padding data on a frame shorter than 64 bytes
when the PD bit is set to high. However, the W89C840AF will automatically add
a padding data on a frame shorter than 64 bytes when the PD bit is reset to low.
The four bytes of CRC will be appended at the end of the padding field of the
transmitted frame no matter what the ICRC is set or reset if the PD is reset.
The total transmited frame data length will be 68 bytes if the data in the current
frame is less than 64 bytes and the PD is reset. This bit is valid only when TFD
(T01[29]) is set.
21:11
TSZ2
Transmit Buffer 2 Size:
The TSZ2 indicates the size, in bytes, of the second data buffer pointed by the
current transmit descriptor. If this field is 0, the W89C840AF will ignore this
buffer. The TSZ2 value is valid on each descriptor.
10:0
TSZ1
Transmit Buffer 1 Size:
The TSZ1 Indicates the size, in bytes, of the first data buffer pointed by the
current transmit descriptor. If this field is 0, the W89C840AF will ignore this
buffer. The TSZ1 value is valid on each descriptor.
T02, Transmit Descriptor 2
The T02 is used to specify the start address of the transmit buffer 1
Bit
Symbol
Description
31:0
TBA1
Transmit Buffer Address 1
The TBA1 indicates the physical address, in the system memory space, of the
first transmit buffer pointed by the current descriptor. The TBA1 allow to be
programmed with any value by the driver program. It is valid on each descriptor
of the current frame.
T03, Transmit Descriptor 3
The T03 is used to specify the start address of the transmit buffer 2
Bit
Symbol
Description
31:0
TBA2
Transmit Buffer Address 2
The TBA2 indicates the physical address, in the system memory space, of the
second transmit buffer pointed by the current descriptor. The TBA2 allow to be
programmed with any value by the driver program. It is valid on each descriptor
of the current frame.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W89C840F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN NODE CONTROLLER |
| W89C841D | 制造商:WINBOND 制造商全稱:Winbond 功能描述:3-IN - 1 10/100M FAST ETHERNET CONTROLLER |
| W89C841F | 制造商:WINBOND 制造商全稱:Winbond 功能描述:3-IN - 1 10/100M FAST ETHERNET CONTROLLER |
| W89C841F/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3-IN-1 100BASE-TX/FX & 10BASE-T Ethernet Controller |
| W89C880F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Hub Controller |
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