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參數(shù)資料
| 型號： | KSZ8721SL TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 6/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX PHY 10/100 3.3V 48SSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | IEEE 802 |
| 電源電壓： | 3 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-BSSOP（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 48-SSOP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1080 (CN2011-ZH PDF) |
| 配用： | 576-1630-ND - BOARD EVALUATION FOR KSZ8721SL |
| 其它名稱： | 576-1031-6 |
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KS8721BL/SL
Micrel
M9999-051704
14
May 2004
to the RMII. TX_EN is negated prior to the first REF_CLK following the final di-bit of a frame. TX_EN transitions synchronously
with respect to REF_CLK.
Transmit Data [1:0] (TXD[1:0])
Transmit Data TXD[1:0] transitions synchronously with respect to REF_CLK. When TX_EN is asserted, TXD[1:0] are accepted
for transmission by the PHY. TXD[1:0] remains as “00” to indicate idle when TX_EN is de-asserted. Values of TXD[1:0] other
than “00” when TX_EN is de-asserted are reserved for out-of-band signalling (to be defined). Values other than “00” on
TXD[1:0] while TX_EN is de-asserted are ignored by the PHY.
Collision Detection
Since the definition of CRS_DV and TX_EN both contain an accurate indication of the start of frame, the MAC reliably
regenerates the COL signal of the MII by ANDing TX_EN and CRS_DV.
During the IPG time following the successful transmission of a frame, the COL signal is asserted by some transceivers as a
self-test. The Signal Quality Error (SQE) function is not supported by the reduced MII due to the lack of the COL signal.
Historically, SQE was present to indicate that a transceiver located physically remote from the MAC was functioning. Since
the reduced MII only supports chip-to-chip connections on a PCB, SQE functionality is not required.
RX_ER
The PHY provides RX_ER as an output according to the rules specified in IEEE 802.3u [2] (see Clause 24, Figure 24-11–
Receive State Diagram). RX_ER is asserted for one or more REF_CLK periods to indicate that an error (e.g., a coding error
or any error that a PHY is capable of detecting, and that may otherwise be undetectable by the MAC sublayer) is detected
somewhere in the frame presently being transferred from the PHY. RX_ER transitions synchronously with respect to
REF_CLK. While CRS_DV is de-asserted, RX_ER has no effect on the MAC.
RMII AC Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
REF_CLK Frequency
50
MHz
REF_CLK Duty Cycle
35
65
%
t
SU
TXD[1:0], TX_EN, RXD[1:0], CRS_DV, RXER
4
ns
t
H
TXD[1:0], TX_EN, RXD[1:0], CRS_DV, RXER
2
ns
Data Hold from REF_CLK
Rising Edge
Unused RMII Pins
Input Pins
TXD[2:3] and TXER are pull-down to GND.
Output Pins
RXD[2:3] and RXC are no connect.
Note that the RMII pin needs to be pulled up to enable RMII mode.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| KSZ8765CLXCC | 功能描述:Ethernet Switch 10/100 Base-FX/T/TX PHY MII, RMII Interface 80-LQFP (10x10) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:開關(guān) 接口:MII，RMII 標(biāo)準(zhǔn):10/100 Base-FX/T/TX PHY 電壓 - 電源:3.3V 電流 - 電源:- 工作溫度:0°C ~ 70°C 封裝/外殼:80-LQFP 供應(yīng)商器件封裝:80-LQFP（10x10） 標(biāo)準(zhǔn)包裝:160 |
| KSZ8765CLXIC | 功能描述:Ethernet Switch 10/100 Base-FX/T/TX PHY MII, RMII Interface 80-LQFP (10x10) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:開關(guān) 接口:MII，RMII 標(biāo)準(zhǔn):10/100 Base-FX/T/TX PHY 電壓 - 電源:3.3V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 封裝/外殼:80-LQFP 供應(yīng)商器件封裝:80-LQFP（10x10） 標(biāo)準(zhǔn)包裝:160 |
| KSZ8775CLXCC | 功能描述:Ethernet Controller 10/100 Base-FX/T/TX PHY MII, RMII Interface 80-LQFP (10x10) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:控制器 接口:MII，RMII 標(biāo)準(zhǔn):10/100 Base-FX/T/TX PHY 電壓 - 電源:3.3V 電流 - 電源:- 工作溫度:0°C ~ 70°C 封裝/外殼:80-LQFP 供應(yīng)商器件封裝:80-LQFP（10x10） 標(biāo)準(zhǔn)包裝:160 |
| KSZ8775CLXIC | 功能描述:Ethernet Controller 10/100 Base-FX/T/TX PHY MII, RMII Interface 80-LQFP (10x10) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:控制器 接口:MII，RMII 標(biāo)準(zhǔn):10/100 Base-FX/T/TX PHY 電壓 - 電源:3.3V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 封裝/外殼:80-LQFP 供應(yīng)商器件封裝:80-LQFP（10x10） 標(biāo)準(zhǔn)包裝:160 |
| KSZ8794CNXCC | 功能描述:Ethernet Controller 10/100 Base-T/TX PHY MII, RMII Interface 64-QFN (8x8) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:控制器 接口:MII，RMII 標(biāo)準(zhǔn):10/100 Base-T/TX PHY 電壓 - 電源:3.3V 電流 - 電源:- 工作溫度:0°C ~ 70°C 封裝/外殼:64-VFQFN 裸露焊盤 供應(yīng)商器件封裝:64-QFN（8x8） 標(biāo)準(zhǔn)包裝:260 |
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