參數(shù)資料
型號(hào)： AM79C874VC
廠商： ADVANCED MICRO DEVICES INC
元件分類： 網(wǎng)絡(luò)接口
英文描述： NetPHY-1LP Low Power 10/100-TX/FX Ethernet Transceiver
中文描述： DATACOM, ETHERNET TRANSCEIVER, PQFP80
封裝： 12 X 12 MM, PLASTIC, MO-136BAM, TQFP-80
文件頁(yè)數(shù)： 10/60頁(yè)
文件大小： 869K
代理商： AM79C874VC
10
Am79C874
P R E L I M I N A R Y
PIN DESCRIPTIONS
The following table describes terms used in the pin de-
scriptions.
Media Connections
TX±
Transmitter Outputs
The TX pins are the differential transmit output pair.
The TX pins transmit 10BASE-T or MLT-3 signals de-
pending on the state of the link of the port.
Analog Output
RX±
Receiver Input
The RX pins are the differential receive input pair. The
RX pins can receive 10BASE-T or MLT-3 signals de-
pending on the state of the link of the port.
Analog Input
FXT±
FX Transmit
These pins are not connected in 10/100BASE-TX
mode.
Analog Output
When FX_SEL (Pin 44) is pulled low, these pins be-
come the ECL level transmit output for 100BASE-FX.
TEST0/FXR-
Test Output/FX Receive
When BURN_IN (Pin 7) is pulled high, this pin serves
as a test mode output monitor pin.
-Analog Output/Input
When FX_SEL (Pin 44) is pulled low, this pin becomes
an ECL level negative receive input for 100BASE-FX.
This pin can be left unconnected when the device is op-
erating in 100BASE-TX or 10BASE-T mode.
TEST1/FXR+
Test Output/FX Receive
When BURN_IN (Pin 7) is pulled high, this pin serves
as a test mode output monitor pin.
+Analog Output/Input
When FX_SEL (Pin 44) is pulled low, this pin becomes
an ECL level positive receive input for 100BASE-FX.
This pin can be left unconnected when the device is op-
erating in 100BASE-TX or 10BASE-T mode.
TEST3/SDI+
FX Transceiver Signal Detect Analog Output/Input
When BURN_IN (Pin 7) is pulled high, this pin serves
as a test mode output monitor pin.
This pin is not connected in 10/100BASE-TX mode.
When FX_SEL (Pin 44) is pulled low, this pin becomes
the Signal Detect input from the Fiber-Optic trans-
ceiver. When the signal quality is good, the SDI+ pin
should be driven high.
MII/7-Wire (GPSI) Signals
RXD[3:0]
MII Receive Data
Output, High Impedance
The data is synchronous with RX_CLK when RX_DV is
active. When the 7-wire 10BASE-T interface operation
is enabled (GPIO[0]= HIGH), RXD[0] will serve as the
10 MHz serial data output.
RX_DV
Receive Data Valid
RX_DV is asserted when the NetPHY-1LP device is
presenting recovered nibbles on RXD[3:0]. This in-
cludes the preamble through the last nibble of the data
stream on RXD[3:0]. In 100BASE-X mode, the /J/K/ is
considered part of the preamble; thus RX_DV is as-
serted when /J/K/ is detected. In 10BASE-T mode,
RX_DV is asserted (and data is presented on
RXD[3:0]) when the device detects valid preamble bits.
RX_DV is synchronized to RX_CLK.
Output, High Impedance
RX_CLK/10RXCLK
Receive Clock
A continuous clock (which is active while LINK is estab-
lished) provides the timing reference for RX_DV,
RX_ER, and RXD[3:0] signals. It is 25 MHz in
100BASE-TX/FX and 2.5 MHz in 10BASE-T. To further
reduce power consumption of the overall system, the
device provides an optional mode enabled through MII
Register 16, bit 0 in which RX_CLK is held inactive
(low) when no data is received. If RX_CLK is needed
when LINK is not established, the NetPHY-1LP must be
placed into digital loopback or force the link via register
21, bits 13 or 14.
Output, High Impedance
When 7-wire 10BASE-T mode is enabled, this pin will
provide a 10 MHz clock. RX_CLK is high impedance
when the ISO pin is enabled
RX_ER/RXD[4]
Receive Error
When RX_ER is active high, it indicates an error has
been detected during frame reception.
Output, High Impedance
This pin becomes the highest-order bit of the receive 5-
bit code group in PCS bypass (PCSBP=HIGH) mode.
This output is ignored in 10BASE-T operation.
Term
Description
Input
Digital input to the PHY
Analog Input
Analog input to the PHY
Output
Digital output from the PHY
Analog Output
Analog output from the PHY
High Impedance
Tri-state capable output from the PHY
Pull-Up
PHY has internal pull-up resistor.
NC=HIGH
Pull-Down
PHY has internal pull-down resistor.
NC=LOW
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C874VD 制造商:Advanced Micro Devices 功能描述:PHY 1-CH 10Mbps/100Mbps 80-Pin TQFP 制造商:AMD (Advanced Micro Devices) 功能描述:PHY 1-CH 10Mbps/100Mbps 80-Pin TQFP
AM79C874VF 制造商:Advanced Micro Devices 功能描述:PHY 1-CH 10Mbps/100Mbps 80-Pin TQFP 制造商:AMD (Advanced Micro Devices) 功能描述:PHY 1-CH 10Mbps/100Mbps 80-Pin TQFP
AM79C874VI 制造商:Advanced Micro Devices 功能描述:PHY 1-CH 10Mbps/100Mbps 80-Pin TQFP 制造商:AMD (Advanced Micro Devices) 功能描述:PHY 1-CH 10Mbps/100Mbps 80-Pin TQFP
AM79C874WW 制造商:Advanced Micro Devices 功能描述:8" WAFER, DIE IN WAFER FORM, SINGLE PORT ETHERNET 10/100 - Trays
AM79C875 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:NetPHY⑩ 4LP Low Power Quad 10/100-TX/FX Ethernet Transceiver
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