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參數(shù)資料
| 型號： | DM8108 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8 port 10/100M Fast Ethernet Switching Controller |
| 中文描述： | 8端口10/100M快速以太網(wǎng)交換控制器 |
| 文件頁數(shù)： | 24/35頁 |
| 文件大?。?/td> | 371K |
| 代理商： | DM8108 |
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DM8108
8 port 10/100M Fast Ethernet Switching Controller
24
Preliminary
Version: DM8108-DS-P02
November 25, 1999
Forward a Multicast, Broadcast and “Unknown”
packet
If the received packet’s DA is not found in the Address
Table, or the packet is a Multicast or Broadcast packet,
it will be treated as a Multicast packet, the switching
engine will perform most of the steps mentioned
above and forwards the packet to all ports.
DRAM Controller
The DM8108 includes direct support for Synchronous
DRAM. The DRAM interface is entirely glue-less. All
the accesses are performed as 32-bit. The memory
controller is designed targeting up to 90-MHz.
The DM8108 refreshes the DRAM automatically.
Following the RESET, the DRAM controller will
perform DRAM testing by write/read several patterns
and invalidate all the entries in the Address Table. The
DRAM test result is sent out through the LED status
outputs.
LED interface
The DM8108 provides LED data bus, address bus and
strobe signals to:
Display the chip or ports’ configuration and
transfer status,
Display the critical state signals for debug
purpose.
LED signals definition
The following timing diagram shows the interface of
LED bus while displaying LED signals.
LDCLK
1us
LDSTB
LD
For the LED signals having dynamic characteristics, the
DM8108 will maintain the signal for a minimum of
4ms before sending to the LED bus if the state is triggered.
Dynamic
signal
LD 4ms – 8 ms
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相關(guān)代理商/技術(shù)參數(shù) |
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| DM-810A | 功能描述:數(shù)字萬用表 DMM,TRMS 1000V AC/DC 600mA to 10A RoHS:否 制造商:Tektronix 產(chǎn)品:Multimeters 類型:Bench 準確性:0.04 % 電壓范圍:2 V to 2 kV 電阻范圍: 電容范圍: 顯示計數(shù): 頻率:10 Hz to 45 Hz, 850 Hz to 1 MHz 測距: 真均方根值: 數(shù)據(jù)保持: |
| DM-810A-C | 功能描述:數(shù)字萬用表 DMM,TRMS 1000V AC/DC 600mA to 10A, CALIB RoHS:否 制造商:Tektronix 產(chǎn)品:Multimeters 類型:Bench 準確性:0.04 % 電壓范圍:2 V to 2 kV 電阻范圍: 電容范圍: 顯示計數(shù): 頻率:10 Hz to 45 Hz, 850 Hz to 1 MHz 測距: 真均方根值: 數(shù)據(jù)保持: |
| DM8121J/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Input Digital Multiplexer |
| DM8121N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Input Digital Multiplexer |
| DM8121N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Input Digital Multiplexer |
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