參數(shù)資料
型號： 84221
廠商： LSI Corporation
英文描述： Quad 100BaseTX/100BaseFX/10BaseT Physical Layer Device （Highly Integrated Ethernet Transceiver For Twisted Pair And Fiber Ethernet Applications）(四通道100BaseTX/100BaseFX/10BaseT 物理層處理器（高度集成的以太網(wǎng)雙絞線和光纖數(shù)據(jù)收發(fā)器）)
中文描述： 四100BaseTX/100BaseFX/10BaseT物理層裝置（高度集成的以太網(wǎng)收發(fā)器，雙絞線和光纖以太網(wǎng)的應(yīng)用）（四通道100BaseTX/100BaseFX/10BaseT物理層處理器（高度集成的以太網(wǎng)雙絞線和光纖數(shù)據(jù)收發(fā)器） ）
文件頁數(shù)： 24/70頁
文件大小： 1017K
代理商： 84221
24
MD400184/A
84221
2.19 POWERDOWN
The 84221 can be powered down by setting the
powerdown bit in the MI serial port Control register. In
powerdown mode, the TP outputs are in high impedance
state, all functions are disabled except the MI serial port,
and the power consumption is reduced to a minimum. The
device will be ready for normal operation 50 mS after
powerdown is deasserted.
2.20 CLOCK
The 84221 requires a 50 MHz reference frequency for
internal signal generation in RMII mode. This reference
frequency must be applied to the CLKIN pin.
2.21 LED DRIVERS
The LED[3:0] outputs can drive LED’s tied to either VDD
or GND. The LED definitions assume that the LED
outputs are active low. If the LED Anodes are tied to the
positive power supply (through limiting resistors), the LED
will indicate the event as shown in Table 3. If the LED
Cathodes are tied to ground and the Anodes to the 84221
Driver
output,
they
will
complementary events.
indicate
the
respective
The LED[3:0] outputs can also drive other digital inputs.
Table 3. LED Function Definition
Notes:
Default = 000 When pin LEDDEF = 0
LEDDEF
1
LED3
LINK +
ACT
LINK
100
LED2
COL
LED1
FDX
LED0
10/100
0
ACT
FDX
LINK10
Table 4. LED Event Definition
2.22 REPEATER MODE
The 84221 has one predefined repeater mode which can
be enabled by asserting the REPEATER pin.
2.23 MI SERIAL PORT
2.23.1 Signal Description
The MI serial port has five pins, MDC, MDIO, and
PHYAD[4:2]. MDC is the serial shift clock input. MDIO is a
bidirectional data I/O pin. PHYAD[4:2] are physical
address pins.
Symbol
ACT
Definition
Activity Occurred, Stretch Pulse to
100 mS
Collision Occurred, Stretch Pulse to
100 mS
100 Mb Link Detected
10 Mb Link Detected
100 Mb or 10 Mb Link Detected
LED on if Link Detected (10 or 100).
LED Blinks if Activity Determined,
Stretch Pulse to 100 mS
Full Duplex Mode Detected with Link
Pass
10 Mb Mode Enabled (High) or
100 Mb Mode Enabled (Low) with
Link Pass
COL
LINK100
LINK10
LINK
LINK+ACT
FDX
10/100
相關(guān)PDF資料
PDF描述
84301 84301 4-Port Fast Ethernet Controller manual 3/98
84301 4-Port Fast Ethernet Controller( 4端口快速以太網(wǎng)控制器)
84717000 MINIATURNAEHERUNGSSCHALTER 4MM GLATT PNP
84717002 MINIATURNAEHERUNGSSCHALTER M5 PNP
84717100 MINIATURNAEHERUNGSSCHALTER 4MM GLATT NPN
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842225 REV A1 制造商:Aavid Thermalloy 功能描述:- Bulk
84222C 功能描述:固定電感器 2.2uH 2.0A Mini SMT Power RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
8422303301B 制造商:ESSEX 功能描述:SPDT 277V. COIL ENCLOSED RELAY
84223C 功能描述:固定電感器 22uH 0.6A Mini SMT Power RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
84224C 功能描述:固定電感器 220uH 0.2A Mini SMT Power RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
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