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參數(shù)資料
| 型號： | KSZ8021RNL |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 8/43頁 |
| 文件大?。?/td> | 0K |
| 描述： | TXRX PHY 100BASE TX 3.3V 24QFN |
| 標(biāo)準(zhǔn)包裝： | 75 |
| 類型： | PHY 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RMII |
| 電源電壓： | 1.8V，2.5V，3.3V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 24-QFN 裸露焊盤（4x4） |
| 包裝： | 管件 |
| 其它名稱： | 576-3740-5 |
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Micrel, Inc.
KSZ8021RNL / KSZ8031RNL
August 2010
16
M9999-082710-1.0
So long as carrier detection criteria are met, CRS_DV remains asserted continuously from the first recovered dibit of the
frame through the final recovered dibit, and it is negated prior to the first REF_CLK that follows the final dibit. The data on
RXD[1:0] is considered valid once CRS_DV is asserted. However, since the assertion of CRS_DV is asynchronous
relative to REF_CLK, the data on RXD[1:0] is "00" until proper receive signal decoding takes place.
Receive Data [1:0] (RXD[1:0])
RXD[1:0] transitions synchronously with respect to REF_CLK. For each clock period in which CRS_DV is asserted,
RXD[1:0] transfers two bits of recovered data from the PHY.
RXD[1:0] is "00" to indicate idle when CRS_DV is de-asserted. Values other than “00” on RXD[1:0] while CRS_DV is de-
asserted are ignored by the MAC.
Receive Error (RXER)
RXER is asserted for one or more REF_CLK periods to indicate that a Symbol Error (e.g., a coding error that a PHY is
capable of detecting, and that may otherwise be undetectable by the MAC sub-layer) was detected somewhere in the
frame presently being transferred from the PHY.
RXER transitions synchronously with respect to REF_CLK. While CRS_DV is de-asserted, RXER has no effect on the
MAC.
Collision Detection
The MAC regenerates the COL signal of the MII from TXEN and CRS_DV.
RMII Signal Diagram – for KSZ8021/31RNL
The KSZ8021/31RNL RMII pin connections to the MAC are shown in the following figures for RMII – 25MHz Clock Mode
and RMII – 50MHz Clock Mode.
RMII – 25MHz Clock Mode
The KSZ8031RNL is configured to RMII – 25MHz Clock Mode after it is powered up or hardware reset with the following:
A 25MHz crystal connected to XI, XO (Pins 8, 7), or an external 25MHz clock source (oscillator) connected to XI
The KSZ8021RNL is configured optionally to RMII – 25MHz Clock Mode after it is powered up or hardware reset and
software programmed with the following:
A 25MHz crystal connected to XI, XO (pins 8, 7), or an external 25MHz clock source (oscillator) connected to XI
Register 1Fh, bit [7] programmed to ‘0’ to select RMII – 25MHz Clock Mode
Figure 2. KSZ8021/31RNL RMII Interface (RMII – 25MHz Clock Mode)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8021RNL TR | 功能描述:以太網(wǎng) IC 3.3V, 100Base-FX Physical Layer Transceiver with RMII support (24-QFN) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8021RNL-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 3.3V, 100Base-FX Physical Layer Transceiver w/ RMII Support - Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| KSZ8021RNL-TR | 功能描述:1/1 Transceiver Full RMII 24-QFN (4x4) 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):過期 類型:收發(fā)器 協(xié)議:RMII 驅(qū)動器/接收器數(shù):1/1 雙工:全 接收器滯后:- 數(shù)據(jù)速率:- 電壓 - 電源:1.8V，2.5V，3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商器件封裝:24-QFN（4x4） 標(biāo)準(zhǔn)包裝:1 |
| KSZ8031RNL | 功能描述:TXRX PHY 100BASE TX 3.3V 24QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND |
| KSZ8031RNL TR | 功能描述:以太網(wǎng) IC 3.3V, 10Base-T/100Base-TX Physical Layer Transceiver w/ RMII Support (24-QFN) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
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