參數(shù)資料
型號(hào)： LXT972A
廠(chǎng)商： Intel Corp.
英文描述： 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
中文描述： 3.3雙速快速以太網(wǎng)收發(fā)器數(shù)據(jù)表
文件頁(yè)數(shù)： 23/70頁(yè)
文件大?。?/td> 833K
代理商： LXT972A
3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
—
LXT972A
Datasheet
23
3.4.4
Reset
The LXT972A provides both hardware and software resets. Configuration control of Auto-
Negotiation, speed and duplex mode selection is handled differently for each. During a hardware
reset, Auto-Negotiation and Speed are read in from pins (refer to
Table 8 on page 24
for pin
settings and to
Table 37 on page 58
for register bit definitions).
During a software reset (0.15 = 1), these bit settings are not re-read from the pins. They revert back
to the values that were read in during the last hardware reset. Therefore, any changes to pin values
made since the last hardware reset are not detected during a software reset.
During a hardware reset, register information is unavailable for 1 ms after de-assertion of the reset.
During a software reset (0.15 = 1) the registers are available for reading. The reset bit should be
polled to see when the part has completed reset (0.15 = 0).
3.4.5
Hardware Configuration Settings
The LXT972A provides a hardware option to set the initial device configuration. The hardware
option uses the three LED driver pins. This provides three control bits, as listed in
Table 8
. The
LED drivers can operate as either open-drain or open-source circuits as shown in
Figure 7
.
.
Figure 7. Hardware Configuration Settings
Configuration Bit = 1
Configuration Bit = 0
LED/CFG Pin
LED/CFG Pin
1. The LED/CFG pins automatically
adjust their polarity upon power-
up or reset.
3.3V
相關(guān)PDF資料
PDF描述
LXT972ALC 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
LXT972M Single-Port 10/100 Mbps PHY Transceiver
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LXT9763HC LAN TRANSCEIVER|HEX|QFP|208PIN|PLASTIC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LXT972ALC 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
LXT972LCHFB8 制造商:LEVEL_ONE 功能描述:
LXT972M 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:Single-Port 10/100 Mbps PHY Transceiver
LXT973QC 制造商:Intel 功能描述:LAN Transceiver, Dual, 100 Pin, Plastic, QFP
LXT974 制造商:INTEL 制造商全稱(chēng):Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
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