參數(shù)資料
型號(hào)： LXT971A
廠商： Intel Corp.
英文描述： 3.3V Dual-Speed Fast Ethernet PHY Transceiver
中文描述： 3.3雙速快速以太網(wǎng)物理層收發(fā)器
文件頁(yè)數(shù)： 46/90頁(yè)
文件大小： 568K
代理商： LXT971A
LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
46
Datasheet
Document #: 249414
Revision #: 002
Rev. Date: August 7, 2002
When a long event (such as duplex status) occurs it is edge detected and it starts the stretch timer.
When the stretch timer expires the edge detector is reset so that a long event causes another pulse to
be generated from the edge detector which resets the stretch timer and causes the LED driver to
remain asserted.
Figure 21
shows how the stretch operation functions.
3.10
Boundary Scan (JTAG1149.1) Functions
LXT971A includes a IEEE 1149.1 boundary scan test port for board level testing. All digital input,
output, and input/output pins are accessible. The BSDL file is available by contacting your local
sales office or by accessing the Intel website (www.intel.com)
.
3.10.1
Boundary Scan Interface
This interface consists of five pins (TMS, TDI, TDO, TRST, and TCK). It includes a state machine,
data register array, and instruction register. The TMS and TDI pins are internally pulled up. TCK is
internally pulled down. TDO does not have an internal pull-up or pull-down.
3.10.2
State Machine
The TAP controller is a 16 state machine driven by the TCK and TMS pins. Upon reset the
TEST_LOGIC_RESET state is entered. The state machine is also reset when TMS and TDI are
high for five TCK periods.
3.10.3
Instruction Register
After the state machine resets, the IDCODE instruction is always invoked. The decode logic
ensures the correct data flow to the Data registers according to the current instruction. Valid
instructions are listed in
Table 13
.
3.10.4
Boundary Scan Register (BSR)
Each Boundary Scan Register (BSR) cell has two stages. A flip-flop and a latch are used for the
serial shift stage and the parallel output stage. There are four modes of operation as listed in
Table 12
.
Figure 21. LED Pulse Stretching
Event
LED
Note: The direct drive LED outputs in this diagram are shown as active Low.
stretch
stretch
stretch
相關(guān)PDF資料
PDF描述
LXT972A 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
LXT972ALC 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
LXT972M Single-Port 10/100 Mbps PHY Transceiver
LXT9763 Fast Ethernet 10/100 Hex Transceiver with Full MII
LXT9763HC LAN TRANSCEIVER|HEX|QFP|208PIN|PLASTIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LXT971ABC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN TRANSCEIVER|SINGLE|CMOS|BGA|64PIN|PLASTIC
LXT971ABE 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:3.3V Dual-Speed Fast Ethernet PHY Transceiver
LXT971ALC 制造商:Intel 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Intellon Corporation 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Level One 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP
LXT971ALE 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:3.3V Dual-Speed Fast Ethernet PHY Transceiver
LXT971LC 制造商:Intel 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*