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參數(shù)資料
| 型號(hào)： | DM9008 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | ISA/Plug & Play Super Ethernet Contoller |
| 中文描述： | 的ISA /插頭 |
| 文件頁數(shù)： | 16/68頁 |
| 文件大?。?/td> | 403K |
| 代理商： | DM9008 |
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DM9008
ISA/Plug & Play Super Ethernet Contoller
16
Final
Version :DM9008-DS-F02
June 14, 2000
Data Configure Register (DCR)
This register is used to program the DM9008 for the 8 or 16-bit memory interface, select byte ordering in 16-bit applications, and
establish FIFO thresholds. The DCR must be initialized prior to loading the Remote Byte Count Registers. LAS is set on power up.
7
6
5
4
3
2
1
0
--
FT1
FT0
ARM
LS
LAS
BOS
WTS
Bit
Symbol
Description
D0
WTS
Word Transfer Select
0: Selects 8-bit DMA transfers
1: Selects 16-bit DMA transfers
D1
BOS
Byte Order Select
0: MS byte placed on SD15-SD8 and LS byte on SD7-SD0 (32000, 8086)
1: MS byte placed on SD7-SD0 and LS byte on SD15-SD8 (68000)
Ignored when byte-wide DMA operation is chosen
Note: Byte Order Select mode is not supported in the current version of the DM9008, so
this bit should be cleared in the application
D2
LAS
Long Address Select
0: Dual 16-bit DMA mode
1: Single 32-bit DMA mode
Note: Single 32-bit DMA mode is not supported in the current version of the DM9008, so
this bit should be cleared in the application
D3
LS
Loopback Select
0: Loopback mode selected. Bits D1, D2 of the TCR must also be programmed for
Loopback mode selected
1: Normal Operation
D4
ARM
Auto-initialize Remote
0: Send Command not executed, all packets removed from Buffer Ring under program
control
1: Send Command executed, Remote DMA auto-initialized to remove packets from Buffer
Ring
D5
D6
FT0
FT1
FIFO Threshold Select: Encoded FIFO threshold. During reception, the FIFO threshold
indicates the number of bytes (or words) filled into the FIFO serially from the network
before received data are written to the buffer RAM
Receive Thresholds
FT1 FT0 Word Wide Byte Wide
0 0 1 Word 2 Bytes
0 1 2 Words 4 Bytes
1 0 4 Words 8 Bytes
1 1 6 Words 12 Bytes
During transmission, the FIFO threshold indicates the number of bytes (or words filled into
the FIFO from the Local DMA before transmitted data are read from the buffer RAM. Thus,
the transmission threshold is 16 bytes less than the receive threshold
D7
--
Reserved
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|---|---|
| DM9008F | ISA/Plug & Play Super Ethernet Contoller |
| DM9081 | 10BASE-T Hub Controller |
| DM9081F | 10BASE-T Hub Controller |
| DM9095 | Twisted-Pair Medium Attachment Unit |
| DM9095L | Twisted-Pair Medium Attachment Unit |
相關(guān)代理商/技術(shù)參數(shù) |
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| DM9008AEP | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller with General Processor Interface |
| DM9008AEP_06 | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller with General Processor Interface |
| DM9008AEP_08 | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller with General Processor Interface |
| DM9008C | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller With General Processor Interface |
| DM9008CEP | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller With General Processor Interface |
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