参数资料
型号: WJLXT972ALC.A4SE000
厂商: INTEL CORP
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: LEAD FREE, LQFP-64
文件页数: 7/100页
文件大小: 1046K
代理商: WJLXT972ALC.A4SE000
LXT972A 3.3 V Dual-Speed Fast Ethernet Transceiver
14
Datasheet
Document #: 249186
Revision #: 003
Rev. Date: August 7, 2002
43
MDC
I
Management Data Clock. Clock for the MDIO serial data channel. Maximum
frequency is 8 MHz.
42
MDIO
I/O
Management Data Input/Output. Bidirectional serial data channel for PHY/
STA communication.
64
MDINT
OD
Management Data Interrupt. When bit 18.1 = 1, an active Low output on this
pin indicates status change. Interrupt is cleared by reading Register 19.
Table 3.
LXT972A Network Interface Signal Descriptions
LQFP
Pin#
Symbol
Type1
Signal Description
19
20
TPOP
TPON
O
Twisted-Pair Outputs, Positive & Negative.
During 100BASE-TX or 10BASE-T operation, TPOP/N pins drive 802.3
compliant pulses onto the line.
23
24
TPIP
TPIN
I
Twisted-Pair Inputs, Positive & Negative.
During 100BASE-TX or 10BASE-T operation, TPIP/N pins receive
differential 100BASE-TX or 10BASE-T signals from the line.
1. Type Column Coding: I = Input, O = Output, A = Analog, OD = Open Drain
Table 4.
LXT972A Miscellaneous Signal Descriptions
LQFP
Pin#
Symbol
Type1
Signal Description
5
6
TxSLEW0
TxSLEW1
I
Tx Output Slew Controls 0 and 1. These pins select the TX output slew
rate (rise and fall time) as follows:
TxSLEW1
TxSLEW0
Slew Rate (Rise and Fall Time)
0
3.0 ns
0
1
3.4 ns
1
0
3.9 ns
1
4.4 ns
4RESET
I
Reset. This active Low input is OR’ed with the control register Reset bit
(0.15). The LXT972A reset cycle is extended to 258
s (nominal) after
reset is deasserted.
12
ADDR0
I
Address0. Sets device address.
17
RBIAS
AI
Bias. This pin provides bias current for the internal circuitry. Must be tied
to ground through a 22.1 k
, 1% resistor.
33
PAUSE
I
Pause. When set High, the LXT972A advertises Pause capabilities during
auto negotiation.
1. Type Column Coding: I = Input, O = Output, A = Analog, OD = Open Drain
Table 2.
LXT972A MII Signal Descriptions (Continued)
LQFP
Pin#
Symbol
Type1
Signal Description
1. Type Column Coding: I = Input, O = Output, A = Analog, OD = Open Drain.
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