參數(shù)資料
型號(hào)： TSB14C01AMHV
廠商： Texas Instruments, Inc.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:79; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:20; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:20-35 RoHS Compliant: No
中文描述： 5V的電機(jī)及電子學(xué)工程師聯(lián)合會(huì)1394-1995背板收發(fā)器/仲裁者
文件頁(yè)數(shù)： 10/31頁(yè)
文件大小： 424K
代理商： TSB14C01AMHV
TSB14C01A, TSB14C01AI, TSB14C01AM
5-V IEEE 1394-1995 BACKPLANE TRANSCEIVER/ARBITER
SGLS107A – FEBRUARY 1999 – REVISED NOVEMBER 1999
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
During arbitration, each node that is arbitrating for the bus drives its priority code then its node number out
onto the bus. During each bit period, each node reads back what has been placed on the bus. If it reads back
the same data it was sending, the arbitrating node stays in contention for winning the bus. If it reads
something different than what it was driving, the arbitrating node loses the bus and drops out of contention.
This is the reason for requiring wired-OR operation during arbitration. As long as each node is still sending
0s onto the bus during arbitration, all nodes are still contending to win the bus. The node with the highest
priority (or if all priorities were zero then the highest node number) is the first to drive a 1 onto the bus during
arbitration. The node that sends the first 1 (asserting the bus) and reads it back wins the bus. All other nodes
read back a 1, which does not match the 0 (releasing the bus) they are sending, and drop out of contention.
This arbitration process requires the transceiver selected to be able to read from the bus at the same time it
is driving the bus.
For example, if three nodes, each with priority 0 and a node identifiers of 8, 7, and 2, were to arbitrate for the
bus, the following would occur (see Figure 3):
0
0
0
0
0
0
Driven by Node #2
(TSB14C01A)
0
0
0
0
0
0
0
0
0
0
Driven by Node #7
(TSB14C01A)
0
0
0
0
0
0
0
0
1
0
Driven by Node #8
(TSB14C01A)
0
0
0
0
Bus Data Line
(voltage level on the bus)
Bus Read
NOTE A: This bus is reverse logic, a 1 being driven by the TSB14C01A is asserted by driving a 0 onto the bus by the transceiver.
Figure 3. Three Nodes Arbitrating for the Bus
Since the highest node number is 8 (1000b), node 8 outputs the first 1 (assert the bus) and wins the
arbitration. The other nodes drop out and do not try to drive their node number onto the bus.
The transceivers used must be appropriate for the transfer speed required.
The 1394 bus has two data lines that use data-strobe encoding on the bus. This requires that the
transceivers be able to operate at a maximum frequency of one half of the maximum data transfer rate.
When operating at 50 Mbits/s, the maximum frequency the drivers are required to operate at is 25 MHz.
When operating at 100 Mbits/s, the maximum frequency the drivers are required to operate at is 50 MHz.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TSB14C01APM 功能描述:1394 接口集成電路 5V 50/100Mbps Backplane PLC RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray
TSB14C01APMG4 功能描述:1394 接口集成電路 5V 50/100Mbps Backplane PLC RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray
TSB14C01APMR 功能描述:1394 接口集成電路 50/100Mbps BACKPLANE Phy Layer Cntrlr RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray
TSB14C01APMRG4 功能描述:1394 接口集成電路 5V 1Port 50/100Mbps BP Phy Layer Cntrlr RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray
TSB14C01HV 制造商:TI 制造商全稱:Texas Instruments 功能描述:5-V IEEE 1394-1995 BACKPLANE TRANSCEIVER/ARBITER
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