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參數(shù)資料
| 型號(hào)： | 9860 |
| 廠商： | Intel Corp. |
| 英文描述： | Advanced 10/100 Repeater with Intergrated Management |
| 中文描述： | 高級(jí)10/100中繼器與綜合管理 |
| 文件頁(yè)數(shù)： | 53/118頁(yè) |
| 文件大?。?/td> | 1648K |
| 代理商： | 9860 |
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Advanced 10/100 Repeater with Integrated Management
—
LXT9860/9880
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
53
3.10.1.1
Serial Clock
SERCLK is a bidirectional pin; direction control is provided by the RECONFIG input. If
RECONFIG is High, the LXT98x0 drives SERCLK at 625 kHz. If RECONFIG is Low, SERCLK
is an input, between 0 and 2 MHz. The clock can be stopped after each operation, as long as an idle
(at least 12 ones in a row) is transmitted first.
3.10.1.2
Serial Data I/O
The serial data pins, SRX and STX, should be
“
logically
”
tied together using open-collector
buffers. See
Figure 23 on page 68
. The SRX input is compared with the STX output. If a mismatch
occurs, STX goes to a high impedance. STX is driven on the falling edge of SERCLK. SRX is
sampled on the rising edge.
3.10.2
Read and Write Operations
Data can be read or written in blocks. The LXT98x0 can read the full length field of consecutive
counters with a single access. Block writes are limited to 2 long words.
Normally the network manager directs read and write operations to a specific LXT98x0 device
using a two-part address consisting of HubID and Chip Address.
Note:
In the Header Field, the Chip Address is defined by three bits. The Most Significant Bit (MSB) = 0;
the value of the other two bits is set by pins.
The LXT98x0 responds to an operation within 12 serial controller bit times. In the case of an error
during a transfer, the LXT98x0 does not implement the requested command.
3.10.2.1
SMI Collision Handling
Upon colliding with another packet, the LXT98x0 ceases transmission, based on the bit pattern of
the colliding packets as shown in
Figure 12
. In the case of a collision, the driver who is sourcing a
0 wins. The LXT98x0 does not retry a response, unless it was an address arbitration packet. In
addition, if an address arbitration packet jumps in during a request/response sequence, before the
addressed LXT98x0 has responded, the addressed LXT98x0 aborts the requested operation.
Note:
The minimum time between packets must be at least 12 bit times with the data set to all ones.
3.10.2.2
SMI Address Match Indication
The LXT98x0 SER_MATCH pin (see
Figure 13
) indicates detection of a serial command matching
the device Hub ID. Broadcast commands also trigger the SER_MATCH output. Note that the initial
HubID upon power-up or reset is the Broadcast (all ones) address.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 9860 0101000 | 功能描述:同軸電纜 16AWG 1PR SHIELD 1000ft SPOOL BLACK RoHS:否 制造商:Murata RG 類(lèi)型: 阻抗:50 Ohms 線規(guī) - 美國(guó)線規(guī)（AWG）: 導(dǎo)體材料: 絞合: 長(zhǎng)度:300 mm 外殼材料: 外徑: 屏蔽: |
| 9860 0102000 | 功能描述:TWINAX 16AWG SOLID 124 OHM 制造商:belden inc. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1 |
| 9860 010500 | 制造商:Belden Inc 功能描述:2 #16 FPE SHLD PVC |
| 9860 152M | 制造商:Belden Inc 功能描述:CABLE BELDEN 9860 152M |
| 9860 152M | 制造商:Belden Inc 功能描述:CABLE BELDEN 9860 152M |
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